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Doubles in session


Current system
21255+0203
STT 439 AB,C
HD 203993


Nearby doubles
9' : 21251+0157
BAL1588

30' : 21276+0204
J 2349

46' : 21256+0248
J 1039

49' : 21242+0248
J 914

51' : 21234+0123
BAL1228

56' : 21218+0202
STF2787AB

57' : 21286+0237
BAL2054

68' : 21279+0105
BAL1230

70' : 21260+0312
BAL2053

70' : 21210+0217
HEI 408AB

71' : 21257+0051
GRV 464

76' : 21276+0054
BAL1229

80' : 21214+0253
STT 435

83' : 21242+0323
BAL2052

84' : 21199+0158
KPP 763

87' : 21243+0327
BAL2561

88' : 21251+0330
FMR 163

88' : 21311+0226
BAL1590

88' : 21211+0104
BAL1227

89' : 21242+0036
ITF 219

90' : 21278-0040
SLW9009

93' : 21315+0140
HJ 3031

93' : 21237+0034
A 886

95' : 21209+0307
BU 838

95' : 21267+0335
VOU 41

97' : 21310+0111
UC 4482



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21255+0203 STT 439 AB,C (HD 203993)

 
 
21h 25m 30.78s +02° 02' 35.0" P.A. 222.00 sep 14.6 mag 7.53,11.33 Sp A1III dist. 296.74 pc (967.97 l.y.)
 
 
Coord 2000 21255+0203 Discov num STT 439 Comp AB,C Coord arcsec 2000 21 25 30.78 +02 02 35.0
Date first 1830 Date last 2018 Obs 22
Pa first 220 Pa last 221.9 P.A. Now (θ) 221.9°
Sep first 12.0 Sep last 14.63 Sep. Now (ρ) 14.63"
Mag pri 7.53 Mag sec 11.33 delta mag (ΔM) 3.8 Spectral class A1III (white)
Pri motion ra +007 Sec motion ra +003
Pri motion dec -019 Sec motion dec -015
Notes N (See Notes)
rPM=0.279 (< 0.3, Physical double)
This double is physical.
 
 
21255+0203 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 126787 21 25 31 +02 02 35 A 2289 AB 2017 18 334 0.1 7.82 9.27 1.45 Y
Show HD 203993 126787 21 25 31 +02 02 35 STT 439 AB,C 2018 22 222 14.6 7.53 11.33 3.80 <===
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 203993 Constellation Aquarius SAO 126787 HIP 105792
Tycho2 0533-01002-1 Gaia DR2 2691752864506307456 HD 203993 BD BD+01 4477
Distance 296.74 Distance ly 967.97
 
 
WDS 21255+0203 STT 439 AB,C (HD 203993) : NOTES
 
 
discov_num notes refcode
A 2289 Little observed in recent years despite considerable orbital motion.
 
 
REFERENCES
 
 
refcode metd author reference
A__1895 Ma - Aitken, R.G. 1895PASP....7..305A
A__1895 PASP 7, 305, 1895 (most data also in A__1914d) 1914PLicO..12....1A
A__1896a Ma - Aitken, R.G. 1896AJ.....17...27A
A__1896a AJ 17, 27, 1896 (most data also in A__1914d) 1914PLicO..12....1A
A__1896b Ma - Aitken, R.G. 1896AN....142...77A
A__1896b AN 142, 77, 1896 (all data also in A__1896a) 1896AJ.....17...27A
A__1896c Ma - Aitken, R.G. 1896PASP....8..286A
A__1896c PASP 8, 286, 1896
A__1896d Ma - Aitken, R.G. 1896PASP....8..314A
A__1896d PASP 8, 314, 1896 (all data also in A__1896a) 1896AJ.....17...27A
A__1897a Ma - Aitken, R.G. 1897AN....142..161A
A__1897a AN 142, 161, 1897 (all data also in A__1896a) 1896AJ.....17...27A
A__1897b Ma - Aitken, R.G. 1897AJ.....17...76A
A__1897b AJ 17, 76, 1897 (all data also in A__1914d) 1914PLicO..12....1A
A__1897c Ma - Aitken, R.G. 1897AJ.....18...56A
A__1897c AJ 18, 56, 1897 (all data also in A__1914d) 1914PLicO..12....1A
A__1897d Ma j Aitken, R.G. 1897AN....145..129A
A__1897d AN 145, 129, 1897 (most data also in A__1914d) 1914PLicO..12....1A
A__1898a Ma - Aitken, R.G. 1898AJ.....18..128A
A__1898a AJ 18, 128, 1898 (all data also in other refs)
A__1898b Ma j Aitken, R.G. 1898AJ.....18..161A
A__1898b AJ 18, 161, 1898 (most data also in other refs)
A__1898b (erratum AJ 18, 180, 1898) 1898AJ.....18..180A
A__1899 Ma - Aitken, R.G. 1899PASP...11..128A
A__1899 PASP 11, 128, 1899
A__1899b Ma j Aitken, R.G. 1899AN....150..113A
A__1899b AN 150, 113, 1899
A__1900a Ma - Aitken, R.G. 1900AN....152..161A
A__1900a AN 152, 161, 1900
A__1900b Ma - Aitken, R.G. 1900AN....153..369A
A__1900b AN 153, 369, 1900
A__1900c Ma - Aitken, R.G. 1900PASP...12..127A
A__1900c PASP 12, 127, 1900 (all data also in A__1900b) 1900AN....153..369A
A__1900d Ma j Aitken, R.G. 1900AN....152..209A
A__1900d AN 152, 209, 1900
A__1900e orb - Aitken, R.G. 1900PASP...12..103A
A__1900e PASP 12, 103, 1900
A__1900f orb - Aitken, R.G. 1900PASP...12..240A
A__1900f PASP 12, 240, 1900
A__1900g Ma j Aitken, R.G. 1900PASP...12..203A
A__1900g PASP 12, 203, 1900
A__1901a Ma j Aitken, R.G. 1901LicOB...1...14A
A__1901a Lick Obs. Bull. 1, 14, 1901
A__1901b Ma j Aitken, R.G. 1901LicOB...1...66A
A__1901b Lick Obs. Bull. 1, 66, 1901
A__1901c orb - Aitken, R.G. 1901PA......9...57A
A__1901c Popular Astron. 9, 57, 1901
A__1901d Ma - Aitken, R.G. 1901AN....156..321A
A__1901d AN 156, 321, 1901 (all data also in A__1901a) 1901LicOB...1...14A
A__1901e Ma - Aitken, R.G. 1901PASP...13..161A
A__1901e PASP 13, 161, 1901 (all data also in other refs)
A__1902a Ma j Aitken, R.G. 1902LicOB...1..129A
A__1902a Lick Obs. Bull. 1, 129, 1902
A__1902b orb - Aitken, R.G. 1902LicOB...1..190A
A__1902b Lick Obs. Bull. 1, 190, 1902
A__1902c orb - Aitken, R.G. 1902PA.....10..486A
A__1902c Popular Astron. 10, 486, 1902
A__1902d orb - Aitken, R.G. 1902PASP...14..153A
A__1902d PASP 14, 153, 1902
A__1902e Ma - Aitken, R.G. 1902AN....158..245A
A__1902e AN 158, 245, 1902 (all data also in A__1902a) 1902LicOB...1..129A
A__1903 Ma j Aitken, R.G. 1903LicOB...2...16A
A__1903 Lick Obs. Bull. 2, 16, 1903
A__1903b Ma - Aitken, R.G. 1903LicOB...2...55A
A__1903b +orb Lick Obs. Bull. 2, 55, 1903 (all data also in other refs)
A__1903c orb - Aitken, R.G. 1903PA.....11...28A
A__1903c Popular Astron. 11, 28, 1903
A__1904a Ma j Aitken, R.G. 1904LicOB...2..139A
A__1904a Lick Obs. Bull. 2, 139, 1904
A__1904b Ma - Aitken, R.G. 1904LicOB...3....6A
A__1904b Lick Obs. Bull. 3, 6, 1904
A__1904c Ma - Aitken, R.G. 1904LicOB...3...61A
A__1904c Lick Obs. Bull. 3, 61, 1904
A__1905a Ma - Aitken, R.G. 1905LicOB...3...88A
A__1905a +orb Lick Obs. Bull. 3, 88, 1905 (all data also in other refs)
A__1905b Ma - Aitken, R.G. 1905LicOB...3...90A
A__1905b Lick Obs. Bull. 3, 90, 1905 (all data also in other refs)
A__1905c orb - Aitken, R.G. 1905LicOB...3..147A
A__1905c Lick Obs. Bull. 3, 147, 1905 (all data also in other refs)
A__1905d orb - Aitken, R.G. 1905LicOB...3..169A
A__1905d Lick Obs. Bull. 3, 169, 1905 (orbit catalog)
A__1905e orb - Aitken, R.G. 1905PA.....13..190A
A__1905e Popular Astron. 13, 190, 1905
A__1906a Ma - Aitken, R.G. 1906LicOB...4....4A
A__1906a Lick Obs. Bull. 4, 4, 1906
A__1906B Ma - Aitken, R.G. 1906MmRAS..56....1L
A__1906B +orb cited by Lewis (MemRAS 56, 1, 1906)
A__1906c orb - Aitken, R.G. 1906LicOB...4...75A
A__1906c Lick Obs. Bull. 4, 75, 1906
A__1906D Ma - Aitken, R.G. 1906QB821.B972.....
A__1906D cited in BDS (Burnham Double Star Cat.), 1906
A__1907a Ma - Aitken, R.G. 1907LicOB...4..101A
A__1907a Lick Obs. Bull. 4, 101, 1907
A__1907b Ma - Aitken, R.G. 1907LicOB...4..125A
A__1907b Lick Obs. Bull. 4, 124, 1907
A__1907c orb - Aitken, R.G. 1907LicOB...4..107A
A__1907c Lick Obs. Bull. 4, 107, 1907 (all data also in other refs)
A__1907d Ma - Aitken, R.G. 1907LicOB...4..170A
A__1907d Lick Obs. Bull. 4, 170, 1907 (all data also in other refs)
A__1907e orb - Aitken, R.G. 1907AN....174..217A
A__1907e AN 174, 217, 1907
A__1907f Ma - Aitken, R.G. 1907AN....176..323A
A__1907f AN 176, 323, 1907 (all data also in other refs)
A__1908a Ma - Aitken, R.G. 1908LicOB...4..166A
A__1908a Lick Obs. Bull. 4, 166, 1908
A__1908b Ma - Aitken, R.G. 1908LicOB...5...28A
A__1908b Lick Obs. Bull. 5, 28, 1908
A__1908c Ma - Aitken, R.G. 1908LicOB...5...55A
A__1908c Lick Obs. Bull. 5, 55, 1908
A__1908d Ma - Aitken, R.G. 1908LicOB...5...43A
A__1908d +orb Lick Obs. Bull. 5, 43, 1908 (all data also in other refs)
A__1908e Ma - Aitken, R.G. 1908PASP...20..185A
A__1908e PASP 20, 185, 1908 (all data also in other refs)
A__1908f orb - Aitken, R.G. 1908PASP...20..267A
A__1908f PASP 20, 267, 1908
A__1908g Ma - Aitken, R.G. 1908PASP...20..290A
A__1908g PASP 20, 290, 1908 (all data also in other refs)
A__1908h Ma - Aitken, R.G. 1908PASP...20..291A
A__1908h PASP 20, 291, 1908
A__1909a Ma - Aitken, R.G. 1909LicOB...5..115A
A__1909a Lick Obs. Bull. 5, 115, 1909
A__1909b Ma - Aitken, R.G. 1909LicOB...5..166A
A__1909b Lick Obs. Bull. 5, 166, 1909
A__1909c orb - Aitken, R.G. 1909PASP...21...83A
A__1909c PASP 21, 83, 1909
A__1910a Ma - Aitken, R.G. 1910LicOB...6...62A
A__1910a Lick Obs. Bull. 6, 62, 1910
A__1910b Ma - Aitken, R.G. 1910LicOB...6...70A
A__1910b Lick Obs. Bull. 6, 70, 1910
A__1910c - Aitken, R.G. 1910LicOB...6....1A
A__1910c Lick Obs. Bull. 6, 1, 1910 (no data)
A__1910d Ma - Aitken, R.G. 1910PASP...22...95A
A__1910d PASP 22, 95, 1910 (all data also in other refs)
A__1910e - Aitken, R.G. 1910PASP...22..137A
A__1910e PASP 22, 137, 1910 (no data)
A__1910f Ma - Aitken, R.G. 1910PASP...22..140A
A__1910f PASP 22, 140, 1910 (all data also in other refs)
A__1911 Ma - Aitken, R.G. 1911LicOB...6..163A
A__1911 Lick Obs. Bull. 6, 163, 1911
A__1911b Ma - Aitken, R.G. 1911PASP...23..238A
A__1911b PASP 23, 238, 1911 (all data also in other refs)
A__1912 Ma - Aitken, R.G. 1912LicOB...7...93A
A__1912 Lick Obs. Bull. 7, 93, 1912
A__1912b - Aitken, R.G. 1912LicOB...2....3A
A__1912b Lick Obs. Bull. 7, 3, 1912 (no data)
A__1912c - Aitken, R.G. 1912PASP...24..126A
A__1912c PASP 24, 126, 1912 (no data)
A__1912d orb - Aitken, R.G. 1912PASP...24..165A
A__1912d PASP 24, 165, 1912
A__1912e orb - Aitken, R.G. 1912PASP...24..216A
A__1912e PASP 24, 216, 1912
A__1912f Ma - Aitken, R.G. 1912PASP...24..228A
A__1912f PASP 24, 228, 1912 (all data also in other refs)
A__1912g Ma - Aitken, R.G. 1912PA.....20..643A
A__1912g Popular Astron. 20, 643, 1912 (all data also in other refs)
A__1913 Ma - Aitken, R.G. 1913LicOB...7..186A
A__1913 Lick Obs. Bull. 7, 186, 1913
A__1913b Ma - Aitken, R.G. 1913PASP...25...41A
A__1913b +orb PASP 25, 41, 1913 (all data also in other refs)
A__1914a Ma - Aitken, R.G. 1914LicOB...8...52A
A__1914a Lick Obs. Bull. 8, 52, 1914
A__1914b Ma - Aitken, R.G. 1914LicOB...8...93A
A__1914b Lick Obs. Bull. 8, 93, 1914
A__1914c Ma - Aitken, R.G. 1914LicOB...8...96A
A__1914c Lick Obs. Bull. 8, 96, 1914
A__1914d Ma j Aitken, R.G. 1914PLicO..12....1A
A__1914d +orb Pub. Lick Obs. 12, 1, 1914
A__1914e orb - Aitken, R.G. 1914PLicO..12..100A
A__1914e Pub. Lick Obs. 12, 100, 1914
A__1914f orb - Aitken, R.G. 1914LicOB...8...99A
A__1914f Lick Obs. Bull. 8, 99, 1914
A__1914g Ma - Aitken, R.G. 1914PASP...26...53A
A__1914g PASP 26, 53, 1914 (all data also in other refs)
A__1914h Ma - Aitken, R.G. 1914PASP...26..205A
A__1914h PASP 26, 205, 1914 (all data also in other refs)
A__1914i Ma - Aitken, R.G. 1914PASP...26..208A
A__1914i +orb PASP 26, 208, 1914 (all data also in other refs)
A__1915 Ma - Aitken, R.G. 1915PASP...27..230A
A__1915 PASP 27, 230, 1915 (some data also in other refs)
A__1916a orb - Aitken, R.G. 1916PASP...28..121A
A__1916a PASP 28, 121, 1916
A__1916b Ma - Aitken, R.G. 1916PASP...28..276A
A__1916b PASP 28, 276, 1916 (all data also in other refs)
A__1917a Ma - Aitken, R.G. 1917PASP...29..207A
A__1917a PASP 29, 207, 1917 (all data also in other refs)
A__1917b Ma - Aitken, R.G. 1917PASP...29..217A
A__1917b PASP 29, 217, 1917 (all data also in other refs)
A__1918a Ma - Aitken, R.G. 1918LicOB...9..132A
A__1918a Lick Obs. Bull. 9, 132, 1918
A__1918b orb - Aitken, R.G. 1918LicOB...9..184A
A__1918b Lick Obs. Bull. 9, 184, 1918
A__1918c orb - Aitken, R.G. 1918LicOB...9..191A
A__1918c Lick Obs. Bull. 9, 191, 1918
A__1918d orb - Aitken, R.G. 1918PAAS....3R..68A
A__1918d PAAS 3, 68, 1918
A__1918e Ma - Aitken, R.G. 1918PASP...30...69A
A__1918e PASP 30, 69, 1918 (all data also in other refs)
A__1918f Ma - Aitken, R.G. 1918PASP...30...71A
A__1918f PASP 30, 71, 1918 (all data also in other refs)
A__1918g orb - Aitken, R.G. 1918PASP...30..194A
A__1918g PASP 30, 194, 1918
A__1918h Ma - Aitken, R.G. 1918PASP...30..262A
A__1918h PASP 30, 262, 1918 (all data also in other refs)
A__1918i orb - Aitken, R.G. 1918PASP...30..311A
A__1918i PASP 30, 311, 1918
A__1919a Ma - Aitken, R.G. 1919PASP...31...44A
A__1919a PASP 31, 44, 1919 (all data also in other refs)
A__1919b Ma - Aitken, R.G. 1919PASP...31..116A
A__1919b PASP 31, 116, 1919 (all data also in other refs)
A__1919c Ma - Aitken, R.G. 1919PASP...31..197A
A__1919c PASP 31, 197, 1919 (all data also in other refs)
A__1919d orb - Aitken, R.G. 1919PASP...31..285A
A__1919d PASP 31, 285, 1919
A__1920a Ma - Aitken, R.G. 1920RGOO.....f...1.
A__1920a Greenwich Observations, F1, 1920
A__1920b Ma - Aitken, R.G. 1920PASP...32...56A
A__1920b PASP 32, 56, 1920 (most data also in other refs)
A__1920c orb - Aitken, R.G. 1920PASP...32..215A
A__1920c PASP 32, 215, 1920
A__1921a Ma - Aitken, R.G. 1921PASP...33...60A
A__1921a PASP 33, 60, 1921 (all data also in other refs)
A__1921b Ma - Aitken, R.G. 1921PASP...33..270A
A__1921b PASP 33, 270, 1921 (all data also in other refs)
A__1922a - Aitken, R.G. 1922PASP...34...52A
A__1922a PASP 34, 52, 1922 (no data)
A__1922b orb - Aitken, R.G. 1922PAAS....4....6A
A__1922b Pub. AAS 4, 6, 1922
A__1923a Ma j Aitken, R.G. 1923LicOB..11...58A
A__1923a +orb Lick Obs. Bull. 11, 58, 1923
A__1923b orb - Aitken, R.G. 1923PASP...35..258A
A__1923b PASP 35, 258, 1923
A__1923c orb - Aitken, R.G. 1923LicOB..11...66A
A__1923c Lick Obs. Bull. 11, 66, 1923
A__1923d orb - Aitken, R.G. 1923LicOB..11...70A
A__1923d Lick Obs. Bull. 11, 70, 1923
A__1923e orb - Aitken, R.G. 1923LicOB..11...79A
A__1923e Lick Obs. Bull. 11, 79, 1923
A__1923f orb - Aitken, R.G. 1923LicOB..11...83A
A__1923f Lick Obs. Bull. 11, 83, 1923
A__1923g orb - Aitken, R.G. 1923LicOB..11...85A
A__1923g Lick Obs. Bull. 11, 85, 1923
A__1923h orb - Aitken, R.G. 1923LicOB..11...97A
A__1923h Lick Obs. Bull. 11, 97, 1923
A__1923i orb - Aitken, R.G. 1923PASP...35...70A
A__1923i PASP 35, 70, 1923
A__1923j Ma - Aitken, R.G. 1923PASP...35..323A
A__1923j PASP 35, 323, 1923 (all data also in other refs)
A__1924 Ma - Aitken, R.G. 1924PASP...36..296A
A__1924 PASP 36, 296, 1924 (all data also in other refs)
A__1925a orb - Aitken, R.G. 1925PASP...37..222A
A__1925a +D PASP 37, 222, 1925
A__1925b orb - Aitken, R.G. 1925LicOB..12...45A
A__1925b Lick Obs. Bull. 12, 45, 1925
A__1925c orb - Aitken, R.G. 1925LicOB..12...47A
A__1925c Lick Obs. Bull. 12, 47, 1925
A__1925D Ma - Aitken, R.G. 1925MNRAS..85..276E
A__1925D cited by Milburn (MNRAS 85, 276, 1925)
A__1926a Ma - Aitken, R.G. 1926PASP...38..131A
A__1926a PASP 38, 131, 1926 (all data also in other refs)
A__1926b Ma - Aitken, R.G. 1926PASP...38..334A
A__1926b PASP 38, 334, 1926 (all data also in other refs)
A__1927a Ma - Aitken, R.G. 1927LicOB..12..170A
A__1927a Lick Obs. Bull. 12, 170, 1927
A__1927b Ma j Aitken, R.G. 1927LicOB..12..173A
A__1927b Lick Obs. Bull. 12, 173, 1927
A__1927c orb - Aitken, R.G. 1927PASP...39...45A
A__1927c PASP 39, 45, 1927
A__1928 Ma - Aitken, R.G. 1928PASP...40..355A
A__1928 PASP 40, 355, 1928 (all data also in other refs)
A__1929a Ma - Aitken, R.G. 1929LicOB..14...62A
A__1929a Lick Obs. Bull. 14, 62, 1929
A__1929b Ma - Aitken, R.G. 1929LicOB..14...88A
A__1929b Lick Obs. Bull. 14, 88, 1929
A__1930a Ma - Aitken, R.G. 1930PASP...42...60A
A__1930a PASP 42, 60, 1930 (all data also in other refs)
A__1930b Ma - Aitken, R.G. 1930PASP...42..123A
A__1930b PASP 42, 123, 1930 (most data also in other refs)
A__1932a Ma - Aitken, R.G. 1932QB821.A43......
A__1932a Aitken Double Star Catalogue, 1932
A__1932b Ma - Aitken, R.G. 1932QB821.A43......
A__1932b Aitken Double Star Catalogue, 1932 (formerly combined in means)
A__1932c orb - Aitken, R.G. 1932PASP...44..127A
A__1932c PASP 44, 127, 1932
A__1932d orb - Aitken, R.G. 1932PASP...44..129A
A__1932d PASP 44, 129, 1932
A__1932e Ma - Aitken, R.G. 1932PASP...44..132A
A__1932e PASP 44, 132, 1932 (all data also in other refs)
A__1933a Ma - Aitken, R.G. 1933PASP...45...90A
A__1933a PASP 45, 90, 1933
A__1933b Ma - Aitken, R.G. 1933PASP...45..261A
A__1933b PASP 45, 261, 1933
A__1933c Ma - Aitken, R.G. 1933LicOB..16...93A
A__1933c Lick Obs. Bull. 16, 93, 1933
A__1933d Ma - Aitken, R.G. 1933LicOB..16...96A
A__1933d Lick Obs. Bull. 16, 96, 1933
A__1933e Ma - Aitken, R.G. 1933PASP...45..190A
A__1933e PASP 45, 190, 1933 (all data also in other refs)
A__1934a Ma - Aitken, R.G. 1934PASP...46..110A
A__1934a PASP 46, 110, 1934 (all data also in other refs)
A__1934b - Aitken, R.G. 1934PASP...46..284A
A__1934b PASP 46, 284, 1934 (no data)
A__1935e Ma j Aitken, R.G. 1935LicOB..17...91A
A__1935e Lick Obs. Bull. 17, 91, 1935
A__1935f - Aitken, R.G. 1935QB821.A3.......
A__1935f The Binary Stars, 1935
A__1936 orb - Aitken, R.G. 1936PASP...48..175A
A__1936 PASP 48, 175, 1936
A__1937a Ma - Aitken, R.G. 1937LicOB..18...53A
A__1937a Lick Obs. Bull. 18, 53, 1937
A__1937b Ma - Aitken, R.G. 1937LicOB..18..109A
A__1937b Lick Obs. Bull. 18, 109, 1937
A__9999 Ma - Aitken, R.G. ...................
A__9999 Unpublished, manuscript or reference not found.
STTA (O. Struve DD - Appendix list) ...................
Stt1864 Ma - Struve, O. 1864MNRAS..24..149S
Stt1864 MNRAS 24, 149, 1864
Stt1866 orb - Struve, O. .
Stt1866 Bull. Imp. Acad. Sci. St. Petersburg, 1866
Stt1874 orb - Struve, O. .
Stt1874 Compte Rendus 79, 1467, 1874
Stt1875 orb - Struve, O. 1875MNRAS..35..367S
Stt1875 MNRAS 35, 367, 1875
Stt1878 Ma - Struve, O. 1878ObPul...9....1S
Stt1878 Pulkova Observations 9, 1, 1878
Stt1879A Ma - Struve, O. 1879Obs.....2..304G
Stt1879A cited by Gledhill (Obs 2, 304, 1879)
Stt1879B Ma - Struve, O. 1879Obs.....3..245G
Stt1879B cited by Gledhill (Obs 3, 245, 1879)
Stt1879C Ma - Struve, O. 1879Obs.....2..344G
Stt1879C cited by Gledhill (Obs 2, 344, 1879)
Stt1880A Ma - Struve, O. 1880Obs.....2..605H
Stt1880A cited by Hunt (Obs. 3, 605, 1880)
Stt1880B Ma - Struve, O. 1880Obs.....3..535G
Stt1880B cited by Gledhill (Obs 3, 535, 1880)
Stt1880C Ma - Struve, O. 1880MNRAS..40..497B
Stt1880C cited by Burnham (MNRAS 40, 497, 1880)
Stt1884A Ma - Struve, O. 1884AReg...22..216S
Stt1884A cited by Sadler (Astr. Register 22, 216, 1884)
Stt1893a Ma j Struve, O. 1893ObPul..10....1S
Stt1893a Pulkova Obs. Observations 10, 1, 1893
Stt1906A Ma - Struve, O. 1906MmRAS..56....1L
Stt1906A cited by Lewis (MemRAS 56, 1, 1906)
Stt1906B Ma j Struve, O. 1906QB821.B972.....
Stt1906B cited in BDS (Burnham Double Star Cat., 1906)
Stt1908A Ma - Struve, O. 1908MNRAS..68..465B
Stt1908A cited by Barnard (MNRAS 68, 465, 1908)
Stt1913A Ma - Struve, O. 1913QB811.B8.......
Stt1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Stt1914A Ma - Struve, O. 1914AN....198..107R
Stt1914A cited by Rabe (AN 198, 107, 1914)
Stt1932A Ma - Struve, O. 1932QB821.A43......
Stt1932A cited in ADS (Aitken Double Star Cat., 1932)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21255+0203 STT 439 AB,C 2000 17 221 15.3 7.53 11.33 A1III N D 212530.78+020235.0
21255+0203 STT 439 AB,C 2014 21 221 15.4 7.53 11.33 A1III N 212530.78+020235.0
21255+0203 STT 439 AB,C 2018 22 222 14.6 7.53 11.33 A1III N 212530.78+020235.0

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WDS 21255+0203 STT 439 AB,C (HD 203993) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21255+0203 STT 439 AB,C (HD 203993) : MEASURES
 
 
No records found.

 
 
WDS 21255+0203 (HD 203993) : VIRTUAL EYEPIECE
 
 

21255+0203 A 2289A mag 7.82 Sp A1III 21255+0203 A 2289B sep 0.1 P.A. 333.80 mag 9.27 21255+0203 STT 439C sep 14.6 P.A. 221.90 mag 11.33 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 21255+0203 (HD 203993) : ALADIN DSS IMAGE @ 21h 25m 30.78s +02° 02' 35.0"
 
 
 
 
WDS 21255+0203 STT 439 AB,C (HD 203993) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21255+0203 STT 439AB,C distance=0' 21251+0157 BAL1588 distance=9' 21276+0204 J 2349 distance=30' 21256+0248 J 1039 distance=46' 21242+0248 J 914 distance=49' 21234+0123 BAL1228 distance=51' 21218+0202 STF2787AB distance=56' 21218+0202 STF2787AC distance=56' 21286+0237 BAL2054 distance=57' 21279+0105 BAL1230 distance=68' 21210+0217 HEI 408DE distance=69' 21260+0312 BAL2053 distance=70' 21210+0217 BAL1586Aa,Ab distance=70' 21210+0217 HEI 408AB distance=70' 21210+0217 HEI 408AC distance=70' 21210+0217 HEI 408AD distance=70' 21257+0051 GRV 464 distance=71' 21276+0054 BAL1229 distance=76' 21214+0253 STT 435 distance=80' 21242+0323 BAL2052 distance=83' 21199+0158 KPP 763 distance=84' 21243+0327 BAL2561 distance=87' 21251+0330 FMR 163 distance=88' 21311+0226 BAL1590 distance=88' 21211+0104 BAL1227 distance=88' 21242+0036 ITF 219 distance=89' 21278-0040 SLW9009 distance=90' 21315+0140 HJ 3031 distance=93' 21237+0034 A 886 distance=93' 21209+0307 BU 838 distance=95' 21267+0335 VOU 41 distance=95' 21310+0111 UC 4482 distance=97' 21315+0122 ITF 88 distance=99' 21243+0343 A 2288 distance=102' 21197+0256 CVR 893 distance=104' 21318+0116 BAL1231 distance=105' 21266+0347 TDT2969 distance=106' 21188+0245 BAL2051 distance=110' 21328+0159 A 2290 distance=110' 21185+0236 OSO 144 distance=110' 21182+0141 BAL1584 distance=112' 21189+0252 HEI 407 distance=113' 21261-0010 RST5164 distance=114' 21211+0336 NSN 5 distance=115' 21317+0312 J 1723 distance=118' 21330+0244 GWP3073 distance=120' 21210+0022 RST5162 distance=122' 21324-0059 SLW1241 distance=122' 21338+0147 BLZ 1 distance=126' 21225+0403 UC 4462 distance=130' 21198+0026 WAA 50 distance=130' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 21255+0203 A 2289 AB 334 0.1
Show 21255+0203 STT 439 AB,C 222 14.6
Show 21251+0157 BAL1588 134 17.2 9
Show 21276+0204 J 2349 237 8.4 30
Show 21256+0248 J 1039 332 4.3 46
Show 21242+0248 J 914 1.8 49
Show 21234+0123 BAL1228 317 5.9 51
Show 21218+0202 STF2787 AB 20 22.6 56
Show 21218+0202 STF2787 AC 94 70.4 56
Show 21286+0237 BAL2054 121 18.1 57
Show 21279+0105 BAL1230 274 11.9 68
Show 21210+0217 HEI 408 DE 106 54.5 69
Show 21260+0312 BAL2053 93 19.9 70
Show 21210+0217 BAL1586 Aa,Ab 111 0.6 70
Show 21210+0217 HEI 408 AB 258 2.3 70
Show 21210+0217 HEI 408 AC 273 55.5 70
Show 21210+0217 HEI 408 AD 111 95.2 70
Show 21257+0051 GRV 464 300 26.1 71
Show 21276+0054 BAL1229 332 10.6 76
Show 21214+0253 STT 435 239 0.7 80
Show 21242+0323 BAL2052 256 16.9 83
Show 21199+0158 KPP 763 174 6.6 84
Show 21243+0327 BAL2561 288 20.5 87
Show 21251+0330 FMR 163 12 15.4 88
Show 21311+0226 BAL1590 285 2.7 88
Show 21211+0104 BAL1227 152 4.3 88
Show 21242+0036 ITF 219 270 2.6 89
Show 21278-0040 SLW9009 59 31.2 90
Show 21315+0140 HJ 3031 250 28.1 93
Show 21237+0034 A 886 349 4.8 93
Show 21209+0307 BU 838 156 1.6 95
Show 21267+0335 VOU 41 171 0.1 95
Show 21310+0111 UC 4482 122 55.1 97
Show 21315+0122 ITF 88 31 8.4 99
Show 21243+0343 A 2288 227 0.4 102
Show 21197+0256 CVR 893 85 21.0 104
Show 21318+0116 BAL1231 131 5.5 105
Show 21266+0347 TDT2969 155 0.5 106
Show 21188+0245 BAL2051 166 2.6 110
Show 21328+0159 A 2290 261 0.5 110
Show 21185+0236 OSO 144 346 16.8 110
Show 21182+0141 BAL1584 338 9.7 112
Show 21189+0252 HEI 407 62 0.2 113
Show 21261-0010 RST5164 306 0.9 114
Show 21211+0336 NSN 5 65 7.5 115
Show 21317+0312 J 1723 121 2.4 118
Show 21330+0244 GWP3073 326 37.1 120
Show 21210+0022 RST5162 21 0.4 122
Show 21324-0059 SLW1241 129 11.7 122
Show 21338+0147 BLZ 1 3 5.2 126
Show 21225+0403 UC 4462 71 29.2 130

 
 
WDS 21255+0203 : COMPONENTS
 
 
  A B
B pa=333.8°
sep=0.10"
 
C pa=221.9°
sep=14.63"
pa=221.5°
sep=14.66"
 
 
21255+0203 A
 
 
Coord arcsec 2000 212530.78+020235.0 Mag 7.82 Spectral class A1III (white) PmRA 7.00
PmDE -19.0 SAO 126787 HIP 105792 Tycho2 0533-01002-1
HD 203993 BD BD+01 4477
Tycho2
Tycho2 0533-01002-1 Pflag RAmdeg 321.37825142 DEmdeg 2.04301319
PmRA 7.2 PmDE -18.9 E RAmdeg 5 E DEmdeg 6
E pmRA 1.0 E pmDE 1.0 EpRAm 1990.96 EpDEm 1990.75
Num 13 Q RAmdeg 1.4 Q DEmdeg 1.0 Q pmRA 1.4
Q pmDE 1.1 BTmag 7.544 E BTmag 0.016 VTmag 7.533
E VTmag 0.012 Prox 154 TYC T HIP 105792
CCDM AB RAdeg 321.37823500 DEdeg 2.04305694 EpRA 1990 1.63
EpDE 1990 1.67 E RAdeg 4.8 E DEdeg 5.5 Posflg P
Corr 0.0
SAO
SAO 126787 DelFlag RA1950 PmRA1950 0.0007
DE1950 PmDE1950 -0.021 Vmag 8.1 SpType A0
Double code Source 30 CatNum 7502 DM BD+01 4477
DMcomp BDsup HD 203993 M HD 0
GC RA1950rad 5.59802772 DE1950rad 0.03188068 PmRA2000 0.0009
PmDE2000 -0.025
Hipparcos
Catalog H HIP 105792 Proxy H RAhms 21 25 30.78
DEdms +02 02 35.0 Vmag 7.53 VarFlag R Vmag H
RAdeg 321.378 DEdeg 2.04306 AstroRef * Plx 5.36
CCDM 21255+0203 N CCDM I Nsys 1 Ncomp 3
MultFlag C Source Qual C M HIP
Theta Rho HD 203993 BD BD+01 4477
CD CP Dm number +01 4477 VIred 0.04
SpType A0 R SpType Coord arcsec 2000 212530.78+020235.0
Hipparcos 2
HIP 105792 Sn 55 So 3 Nc 3
RArad 5.6091083037 DErad 0.0356580994 Plx 3.37 PmRA 7.41
PmDE -20.84 E RArad 0.74 E DErad 0.57 E Plx 0.94
E pmRA 1.1 E pmDE 0.59 Hpmag 7.5445 E Hpmag 0.0021
SHp 0.014 VA 0 BV 0.01 E BV 0.4
VI 0.04
CCDM
Ccdm 21255+0203 RComp Comp A Note1
Note2 Discov num DRAs 0.84 DDEs -26.2
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.3 Sp A0 PmNote *
PmRA 31 PmDE -34 Dm number +01 4477 Cat1 BD
Name2 +01 2599 Cat2 AGK2/3 HD 203993 M HD
ADS BDS A14960 M ADS BDS N IDS IDS 21204N0137A
HIC 105792
 
 
21255+0203 B
 
 
Coord arcsec 2000 212530.78+020235.1 Mag 9.27 Calc delta mag 1.45 Calc coord yes
CCDM
Ccdm 21255+0203 RComp Comp B Note1
Note2 Discov num A 2289 DRAs DDEs
R dRAs Year 1958 Theta 273 Rho 0.1
Obs 9 Vmag 9.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14960 M ADS BDS N IDS IDS 21204N0137B
HIC 105792
 
 
21255+0203 C
 
 
Coord arcsec 2000 212530.13+020224.1 Mag 11.33 PmRA 3.00 PmDE -15.0
Calc delta mag 3.51 Calc coord yes
CCDM
Ccdm 21255+0203 RComp Comp C Note1
Note2 Discov num STT 439 DRAs DDEs
R dRAs Year 1850 Theta 221 Rho 15.5
Obs 9 Vmag 11.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14960 M ADS BDS N IDS IDS 21204N0137C
HIC