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Current system
21225+0827
HU 275
HD 203520


Nearby doubles
8' : 21221+0832
UC 4460

33' : 21226+0900
CVR 895

56' : 21244+0740
TDT2946

65' : 21187+0857
LDS4877

68' : 21251+0923
BU 164AB

70' : 21178+0817
KPP 490

71' : 21181+0854
UC 4436

77' : 21197+0931
STF2786

86' : 21224+0953
J 1356

88' : 21201+0947
UC 4444AB

89' : 21272+0732
UC 4471

92' : 21286+0838
GWP3065

95' : 21180+0934
HJ 3021

97' : 21277+0729
TDT2978

98' : 21161+0851
CVR 891

99' : 21181+0942
HJ 3020

99' : 21271+0716
UC 4470

99' : 21229+0649
HJ 3023AB

100' : 21263+0707
CVR 245

101' : 21245+1003
SKF 16

103' : 21287+0743
HU 276

104' : 21167+0731
HDS3030

104' : 21229+0644
ALD 76

105' : 21165+0924
LAF 64AB

107' : 21158+0747
SKF1870

108' : 21291+0744
GWP3066



Selections
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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.

21225+0827 HU 275 (HD 203520)

 
 
21h 22m 28.64s +08° 27' 16.1" P.A. 56.00 sep 0.4 mag 9.46,9.54 Sp K0 dist. 418.41 pc (1364.85 l.y.)
 
 
Coord 2000 21225+0827 Discov num HU  275 Comp Coord arcsec 2000 21 22 28.64 +08 27 16.1
Date first 1900 Date last 2017 Obs 12
Pa first 66 Pa last 56.2 P.A. Now (θ) 56.2°
Sep first 0.3 Sep last 0.35 Sep. Now (ρ) 0.35"
Mag pri 9.46 Mag sec 9.54 delta mag (ΔM) 0.08 Spectral class K0 (yellow-orange)
Pri motion ra +010 Sec motion ra
Pri motion dec -011 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 203520 Constellation Equuleus SAO 126743 HIP 105538
Tycho2 1106-01846-1 HD 203520 ADS 14915 BD BD+07 4670
Distance 418.41 Distance ly 1364.85
 
 
WDS 21225+0827 HU 275 (HD 203520) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Hu_1896 not - Hussey, W.F. 1896PASP....8..183H
Hu_1896 PASP 8, 183, 1896
Hu_1897 Ma - Hussey, W.J. 1897AJ.....17...97H
Hu_1897 AJ 17, 97, 1897
Hu_1898 Ma j Hussey, W.J. 1898AJ.....18..145H
Hu_1898 AJ 18, 145, 1898
Hu_1899 Ma j Hussey, W.J. 1899AN....150..175H
Hu_1899 AN 150, 175, 1899
Hu_1900a Ma - Hussey, W.J. 1900AJ.....20..192H
Hu_1900a AJ 20, 192, 1900
Hu_1900b Ma - Hussey, W.J. 1900AJ.....21...35H
Hu_1900b AJ 21, 35, 1900
Hu_1900c Ma j Hussey, W.J. 1900AN....152..329H
Hu_1900c AN 152, 329, #3645, 1900
Hu_1901a Ma j Hussey, W.J. 1901PLicO...5.....H
Hu_1901a +orb Pub. Lick Obs. 5, 1901
Hu_1901b Ma j Hussey, W.J. 1901LicOB...1...82H
Hu_1901b Lick Obs. Bull. 1, 82, 1901
Hu_1902a Ma j Hussey, W.J. 1902LicOB...1..161H
Hu_1902a Lick Obs. Bull. 1, 161, 1902
Hu_1902b Ma j Hussey, W.J. 1902LicOB...2....1H
Hu_1902b Lick Obs. Bull. 2, 1, 1902
Hu_1903a Ma j Hussey, W.J. 1903LicOB...2...73H
Hu_1903a Lick Obs. Bull. 2, 73, 1903
Hu_1903b Ma j Hussey, W.J. 1903LicOB...2..115H
Hu_1903b Lick Obs. Bull. 2, 115, 1903
Hu_1904a Ma j Hussey, W.J. 1904LicOB...2..180H
Hu_1904a Lick Obs. Bull. 2, 180, 1904
Hu_1904b Ma - Hussey, W.J. 1904LicOB...3...53H
Hu_1904b Lick Obs. Bull. 3, 53, 1904
Hu_1905a Ma - Hussey, W.J. 1905LicOB...3...95H
Hu_1905a Lick Obs. Bull. 3, 95, 1905
Hu_1905b Ma - Hussey, W.J. 1905LicOB...3..116H
Hu_1905b Lick Obs. Bull. 3, 116, 1905
Hu_1905c Ma - Hussey, W.J. 1905LicOB...3..151H
Hu_1905c Lick Obs. Bull. 3, 151, 1905
Hu_1906A Ma - Hussey, W.J. 1906MmRAS..56....1L
Hu_1906A cited by Lewis (MemRAS 56, 1, 1906)
Hu_1906B Ma - Hussey, W.J. 1906QB821.B972.....
Hu_1906B cited in BDS (Burnham Double Star Cat.), 1906
Hu_1907 Ma - Hussey, W.J. 1907LicOB...4..124H
Hu_1907 Lick Obs. Bull. 4, 124, 1907
Hu_1910 Ma - Hussey, W.J. 1910AJ.....21..105H
Hu_1910 AJ 21, 105, 1910
Hu_1911 Ma - Hussey, W.J. 1911LicOB...6..182H
Hu_1911 Lick Obs. Bull. 6, 182, 1911
Hu_1912a Ma - Hussey, W.J. 1915POMic...1..147H
Hu_1912a Pub. Univ. Michigan Obs. 1, 147, 1912
Hu_1912b Ma - Hussey, W.J. 1915POMic...1..160H
Hu_1912b Pub. Univ. Michigan Obs. 1, 160, 1912
Hu_1912c Ma - Hussey, W.J. 1915POMic...1..167H
Hu_1912c Pub. Univ. Michigan Obs. 1, 167, 1912
Hu_1927A Ma - Hussey, W.J. 1927sdsc.book......
Hu_1927A cited in SDS (Southern Double Star Cat.), 1927
Hu_1932A Ma - Hussey, W.J. 1932QB821.A43......
Hu_1932A cited in ADS (Aitken Double Star Cat.), 1932
Hu_9999 Ma - Hussey, W.J. ...................
Hu_9999 Unpublished, manuscript or reference not found.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21225+0827 HU 275 1991 9 59 0.3 9.46 9.54 K0 D 212228.64+082716.1
21225+0827 HU 275 2017 10 56 0.4 9.46 9.54 K0 212228.64+082716.1

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 21225+0827 HU 275 (HD 203520) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21225+0827 HU 275 (HD 203520) : MEASURES
 
 
No records found.

 
 
WDS 21225+0827 (HD 203520) : VIRTUAL EYEPIECE
 
 

21225+0827 HU 275A mag 9.46 Sp K0 21225+0827 HU 275B sep 0.3 P.A. 55.90 mag 9.54 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 21225+0827 (HD 203520) : ALADIN DSS IMAGE @ 21h 22m 28.64s +08° 27' 16.1"
 
 
 
 
WDS 21225+0827 HU 275 (HD 203520) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21225+0827 HU 275 distance=1' 21221+0832 UC 4460 distance=8' 21226+0900 CVR 895 distance=33' 21244+0740 TDT2946 distance=56' 21187+0857 LDS4877 distance=65' 21251+0923 BU 164AB distance=68' 21251+0923 STF2793AB,C distance=68' 21178+0817 KPP 490 distance=70' 21181+0854 UC 4436 distance=71' 21197+0931 STF2786 distance=77' 21224+0953 J 1356 distance=86' 21201+0947 UC 4444AB distance=88' 21272+0732 UC 4471 distance=89' 21286+0838 GWP3065 distance=92' 21180+0934 HJ 3021 distance=95' 21277+0729 TDT2978 distance=97' 21161+0851 CVR 891 distance=98' 21229+0649 BU 1504FG distance=99' 21229+0649 BU 1504CD distance=99' 21181+0942 HJ 3020 distance=99' 21271+0716 UC 4470 distance=99' 21229+0649 HJ 3023AB distance=99' 21229+0649 HJ 3023AC distance=99' 21229+0649 HJ 3023AE distance=99' 21263+0707 CVR 245 distance=100' 21245+1003 SKF 16 distance=101' 21287+0743 HU 276 distance=103' 21167+0731 HDS3030 distance=104' 21229+0644 ALD 76 distance=104' 21165+0924 LAF 64AB distance=105' 21165+0924 LAF 64AC distance=105' 21158+0747 SKF1870 distance=107' 21291+0744 GWP3066 distance=108' 21152+0829 SKF1869 distance=108' 21179+0952 HJ 3019 distance=109' 21165+0936 BRT3228 distance=113' 21214+1020 A 617 distance=114' 21202+1018 HJ 933 distance=115' 21144+0807 TDT2847 distance=122' 21147+0907 CVR 890 distance=122' 21268+0642 HJ 3028 distance=124' 21236+1030 BRT1356 distance=124' 21309+0828 J 199 distance=125' 21281+1002 GWP3062 distance=127' 21137+0846 UC 4412AB distance=131' 21137+0846 RAO 449Aa,Ab distance=131' 21151+0712 UC 4422 distance=134' 21181+1027 UC 4435 distance=136' 21143+0725 UC 4415 distance=137' 21141+0729 UC 4414 distance=137' 21316+0823 LDS4893 distance=138' 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 21225+0827 HU 275 56 0.4 1
Show 21221+0832 UC 4460 236 22.0 8
Show 21226+0900 CVR 895 47 17.8 33
Show 21244+0740 TDT2946 54 0.4 56
Show 21187+0857 LDS4877 123 89.5 65
Show 21251+0923 BU 164 AB 93 0.1 68
Show 21251+0923 STF2793 AB,C 241 26.4 68
Show 21178+0817 KPP 490 319 5.0 70
Show 21181+0854 UC 4436 34 37.6 71
Show 21197+0931 STF2786 188 2.8 77
Show 21224+0953 J 1356 176 8.0 86
Show 21201+0947 UC 4444 AB 170 74.7 88
Show 21272+0732 UC 4471 327 11.8 89
Show 21286+0838 GWP3065 135 13.0 92
Show 21180+0934 HJ 3021 237 23.8 95
Show 21277+0729 TDT2978 88 0.4 97
Show 21161+0851 CVR 891 33 8.6 98
Show 21229+0649 BU 1504 FG 156 6.6 99
Show 21229+0649 BU 1504 CD 8 5.2 99
Show 21181+0942 HJ 3020 295 25.8 99
Show 21271+0716 UC 4470 241 48.2 99
Show 21229+0649 HJ 3023 AB 257 40.9 99
Show 21229+0649 HJ 3023 AC 301 74.1 99
Show 21229+0649 HJ 3023 AE 273 96.0 99
Show 21263+0707 CVR 245 104 91.9 100
Show 21245+1003 SKF 16 60 53.2 101
Show 21287+0743 HU 276 29 0.9 103
Show 21167+0731 HDS3030 285 0.2 104
Show 21229+0644 ALD 76 66 3.0 104
Show 21165+0924 LAF 64 AB 29 5.5 105
Show 21165+0924 LAF 64 AC 168 12.4 105
Show 21158+0747 SKF1870 203 43.4 107
Show 21291+0744 GWP3066 106 11.9 108
Show 21152+0829 SKF1869 302 67.9 108
Show 21179+0952 HJ 3019 309 15.0 109
Show 21165+0936 BRT3228 259 6.2 113
Show 21214+1020 A 617 45 0.0 114
Show 21202+1018 HJ 933 239 17.0 115
Show 21144+0807 TDT2847 255 1.9 122
Show 21147+0907 CVR 890 3 29.1 122
Show 21268+0642 HJ 3028 242 21.0 124
Show 21236+1030 BRT1356 63 5.7 124
Show 21309+0828 J 199 187 4.9 125
Show 21281+1002 GWP3062 27 72.0 127
Show 21137+0846 UC 4412 AB 201 8.6 131
Show 21137+0846 RAO 449 Aa,Ab 322 0.4 131
Show 21151+0712 UC 4422 43 16.1 134
Show 21181+1027 UC 4435 259 50.5 136
Show 21143+0725 UC 4415 69.1 137
Show 21141+0729 UC 4414 295 27.0 137
Show 21316+0823 LDS4893 276 7.6 138

 
 
WDS 21225+0827 : COMPONENTS
 
 
  A
B pa=55.9°
sep=0.35"
 
 
21225+0827 A
 
 
Componente originario normalizzato AB Name HD 203520 Coord arcsec 2000 212228.64+082716.1 Mag 9.46
Spectral class K0 (yellow-orange) PmRA 10.00 PmDE -11.0 SAO 126743
HIP 105538 Tycho2 1106-01846-1 HD 203520 ADS 14915
BD BD+07 4670
Tycho2
Tycho2 1106-01846-1 Pflag RAmdeg 320.61938715 DEmdeg 8.45446418
PmRA 1.6 PmDE -7.8 E RAmdeg 9 E DEmdeg 11
E pmRA 1.5 E pmDE 1.5 EpRAm 1990.76 EpDEm 1990.41
Num 9 Q RAmdeg 0.6 Q DEmdeg 0.7 Q pmRA 0.5
Q pmDE 0.7 BTmag 10.024 E BTmag 0.027 VTmag 8.694
E VTmag 0.015 Prox 999 TYC T HIP 105538
CCDM AB RAdeg 320.61938389 DEdeg 8.45448278 EpRA 1990 1.62
EpDE 1990 1.35 E RAdeg 8.7 E DEdeg 11.0 Posflg P
Corr -0.3
SAO
SAO 126743 DelFlag RA1950 PmRA1950 -0.0004
DE1950 PmDE1950 0.003 Vmag 8.6 SpType K0
Double code Source 32 CatNum 10695 DM BD+07 4670
DMcomp BDsup HD 203520 M HD 0
GC RA1950rad 5.58513436 DE1950rad 0.14382188 PmRA2000 -0.0003
PmDE2000 -0.001
Hipparcos
Catalog H HIP 105538 Proxy H RAhms 21 22 28.64
DEdms +08 27 16.1 Vmag 8.57 VarFlag R Vmag H
RAdeg 320.619 DEdeg 8.45446 AstroRef A Plx 1.7
CCDM 21225+0827 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 59 Rho 0.345 HD 203520 BD BD+07 4670
CD CP Dm number +07 4670 VIred 1.09
SpType K0 R SpType Coord arcsec 2000 212228.64+082716.1
Hipparcos 2
HIP 105538 Sn 15 So 3 Nc 2
RArad 5.595863161 DErad 0.1475581435 Plx 2.39 PmRA 0.56
PmDE -5.05 E RArad 1.29 E DErad 0.92 E Plx 1.48
E pmRA 1.7 E pmDE 0.88 Hpmag 8.7418 E Hpmag 0.0017
SHp 0.014 VA 0 BV 1.176 E BV 0.026
VI 1.14
CCDM
Ccdm 21225+0827 RComp Comp A Note1
Note2 Discov num DRAs -1.31 DDEs 15.7
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.6 Sp K0 PmNote *
PmRA 10 PmDE -9 Dm number +07 4670 Cat1 BD
Name2 +08 2953 Cat2 AGK2/3 HD 203520 M HD
ADS BDS A14915 M ADS BDS N IDS IDS 21176N0802A
HIC 105538
 
 
21225+0827 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 212228.66+082716.3 Mag 9.54 Calc delta mag 0.08
Calc coord yes
CCDM
Ccdm 21225+0827 RComp Comp B Note1
Note2 Discov num HU 275 DRAs DDEs
R dRAs Year 1900 Theta 066 Rho 0.3
Obs 5 Vmag 9.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14915 M ADS BDS N IDS IDS 21176N0802B
HIC 105538