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Doubles in session


Current system
20421+5013
ES 91 BC


Nearby doubles
7' : 20422+5020
BU 675AB

29' : 20449+5023
SKF2395

35' : 20441+5043
LEP 171

37' : 20383+5023
HU 588AB

41' : 20380+5025
DAM 294

41' : 20378+5018
DAM 293

43' : 20457+4951
TDT2521

44' : 20465+5005
HDS2958

44' : 20457+5040
STT 412AB

45' : 20466+5004
HDS2959

45' : 20376+5028
L 49

46' : 20418+4929
HEI 910

53' : 20434+4923
STJ 111

57' : 20438+4921
HEI 911

58' : 20425+4916
ARG 39AB

65' : 20486+5029
BU 366AB

65' : 20367+5053
HLD 39AB

66' : 20379+5106
ES 88AB

73' : 20483+5054
ES 998

73' : 20496+5008
ES 94AB

73' : 20347+4957
ES 2696

76' : 20406+4900
ES 509

79' : 20499+5036
CBL 87

79' : 20496+5047
HDS2968

80' : 20441+4856
HEI 912

80' : 20356+5104
TDT2400



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.

20421+5013 ES 91 BC

 
 
20h 42m 03.89s +50° 13' 44.8" P.A. 247.00 sep 14.8 mag 11.05,11.66
 
 
Coord 2000 20421+5013 Discov num ES   91 Comp BC Coord arcsec 2000 20 42 03.89 +50 13 44.8
Date first 1899 Date last 2018 Obs 14
Pa first 239 Pa last 247.2 P.A. Now (θ) 247.2°
Sep first 16.6 Sep last 14.795 Sep. Now (ρ) 14.795"
Mag pri 11.05 Mag sec 11.66 delta mag (ΔM) 0.61 Spectral class
Pri motion ra -037 Sec motion ra -010
Pri motion dec -154 Sec motion dec -004
Notes
rPM=0.962
This double is not physical.
 
 
20421+5013 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 20 42 04 +50 13 49 ES 91 AB 2018 13 189 4.6 11.54 11.70 0.16
Show 20 42 04 +50 13 49 ES 91 AC 2018 13 235 17.6 11.54 11.66 0.12
Show 20 42 04 +50 13 45 ES 91 BC 2018 14 247 14.8 11.05 11.66 0.61 <===
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Tycho2 3582-01142-1 Gaia DR2 2168333107190986624
 
 
WDS 20421+5013 ES 91 BC : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Es_1901 Mb - Espin, T.E. 1901AN....155..321E
Es_1901 AN 155, 321, 1901 (ES 1 - 39)
Es_1902a Ma - Espin, T.E. 1902AN....158..241E
Es_1902a +Mb AN 158, 241, 1902 (ES 40 - 112)
Es_1902b Mb - Espin, T.E. 1902MNRAS..62..528E
Es_1902b MNRAS 62, 528, 1902
Es_1902c Mb j Espin, T.E. 1902MNRAS..62..402E
Es_1902c MNRAS 62, 402, 1902
Es_1903 Mb - Espin, T.E. 1903MNRAS..63..172E
Es_1903 MNRAS 63, 172, 1903 (ES 113 - 150)
Es_1904a - Espin, T.E. 1904MNRAS..64..238E
Es_1904a MNRAS 64, 238, 1904 (data superceded by MNRAS 65, 710, 1905) 1905MNRAS..65..710E
Es_1904b Mb - Espin, T.E. 1904MNRAS..64..675E
Es_1904b MNRAS 64, 675, 1904
Es_1905 Mb - Espin, T.E. 1905MNRAS..65..710E
Es_1905 MNRAS 65, 710, 1905 (ES 151 - 221)
Es_1906a Mb - Espin, T.E. 1906MNRAS..66..141E
Es_1906a MNRAS 66, 141, 1906 (ES 222 - 269)
Es_1906b Mb - Espin, T.E. 1906MNRAS..66..430E
Es_1906b MNRAS 66, 430, 1906 (ES 270 - 311)
Es_1906C Mb - Espin, T.E. 1906QB821.B972.....
Es_1906C cited in BDS (Burnham Double Star Cat.), 1906
Es_1906D Mb - Espin, T.E. 1906MmRAS..56....1L
Es_1906D cited by Lewis (MemRAS 56, 1, 1906)
Es_1907a Mb j Espin, T.E. 1907MNRAS..67..190E
Es_1907a MNRAS 67, 190, 1907 (ES 312 - 403)
Es_1907b Mb - Espin, T.E. 1907MNRAS..67..495E
Es_1907b MNRAS 67, 495, 1907 (ES 404 - 442)
Es_1908a Mb j Espin, T.E. 1908MNRAS..68..202E
Es_1908a MNRAS 68, 202, 1908 (ES 443 - 551)
Es_1908b Mb - Espin, T.E. 1908MNRAS..68..523E
Es_1908b MNRAS 68, 523, 1908 (ES 552 - 609)
Es_1908c - Espin, T.E. 1908JRASC...2..248E
Es_1908c JRASC 2, 248, 1908 (data also in MNRAS 69, 218, 1909) 1909MNRAS..69..218E
Es_1909a Mb j Espin, T.E. 1909MNRAS..69..218E
Es_1909a MNRAS 69, 218, 1909 (ES 610 - 704)
Es_1909b Mb j Espin, T.E. 1909MNRAS..69..604E
Es_1909b MNRAS 69, 604, 1909 (ES 705 - 743)
Es_1910a Mb - Espin, T.E. 1910MNRAS..70..237E
Es_1910a MNRAS 70, 237, 1910 (ES 744 - 864)
Es_1910b Mb - Espin, T.E. 1910MNRAS..70..541E
Es_1910b MNRAS 70, 541, 1910 (ES 865 - 927)
Es_1911 Mb - Espin, T.E. 1911MNRAS..71..217E
Es_1911 MNRAS 71, 217, 1911 (ES 928 - 1051)
Es_1912 Mb - Espin, T.E. 1912MNRAS..72..191E
Es_1912 MNRAS 72, 191, 1912 (ES 1052 - 1125)
Es_1913 Mb j Espin, T.E. 1913MNRAS..73..162E
Es_1913 MNRAS 73, 162, 1913 (ES 1126 - 1191)
Es_1914 Mb j Espin, T.E. 1914MNRAS..74..244E
Es_1914 MNRAS 74, 244, 1914 (ES 1192 - 1293)
Es_1915a Mb - Espin, T.E. 1915MNRAS..75..203E
Es_1915a MNRAS 75, 203, 1915 (ES 1294 - 1356)
Es_1915b Mb - Espin, T.E. 1915MNRAS..75..555E
Es_1915b MNRAS 75, 555, 1915 (ES 1357 - 1405)
Es_1915c Mb - Espin, T.E. 1915MNRAS..76..210E
Es_1915c MNRAS 76, 210, 1915 (ES 1406 - 1479)
Es_1917 Mb - Espin, T.E. 1917MNRAS..77..236E
Es_1917 MNRAS 77, 236, 1917 (ES 1480 - 1600)
Es_1918 Mb j Espin, T.E. 1918MNRAS..78..189E
Es_1918 MNRAS 78, 189, 1918 (ES 1601 - 1705, MLB 1 - 35)
Es_1919 Mb - Espin, T.E. 1919MNRAS..79..211E
Es_1919 MNRAS 79, 211, 1919 (ES 1706 - 1768, MLB 36 - 106)
Es_1920 Mb - Espin, T.E. 1920MNRAS..80..329E
Es_1920 MNRAS 80, 329, 1920 (ES 1769 - 1805, MLB 107 - 149)
Es_1921 Mb j Espin, T.E. 1921MNRAS..81..232E
Es_1921 MNRAS 81, 232, 1921 (ES 1806 - 1864, MLB 150 - 182)
Es_1922 Mb - Espin, T.E. 1922MNRAS..82..187E
Es_1922 MNRAS 82, 187, 1922 (ES 1865 - 1933, MLB 183 - 241)
Es_1923 Mb - Espin, T.E. 1923MNRAS..83..154E
Es_1923 MNRAS 83, 154, 1923 (ES 1934 - 2006, MLB 242 - 275)
Es_1924 Mb - Espin, T.E. 1924MNRAS..84..162E
Es_1924 MNRAS 84, 162, 1924 (ES 2007 - 2078, MLB 276 - 322)
Es_1925a Mb - Espin, T.E. 1925MNRAS..85..276E
Es_1925a MNRAS 85, 276, 1925 (ES 2079 - 2137, MLB 323 - 376)
Es_1925b Mb - Espin, T.E. 1925MNRAS..86...79E
Es_1925b MNRAS 86, 79, 1925
Es_1926 Mb - Espin, T.E. 1926MNRAS..86..131E
Es_1926 MNRAS 86, 131, 1926 (ES 2138 - 2209, MLB 377 - 440)
Es_1927 Mb - Espin, T.E. 1927MNRAS..87..215E
Es_1927 MNRAS 87, 215, 1927 (ES 2210 - 2273, MLB 441 - 510)
Es_1928 Mb - Espin, T.E. 1928MNRAS..88..185E
Es_1928 MNRAS 88, 185, 1928 (ES 2274 - 2328, MLB 511 - 551)
Es_1929 Mb - Espin, T.E. 1929MNRAS..89..268E
Es_1929 MNRAS 89, 268, 1929 (ES 2329 - 2362, MLB 552 - 591)
Es_1930 Mb - Espin, T.E. 1930MNRAS..90..317E
Es_1930 MNRAS 90, 317, 1930 (ES 2363 - 2400, MLB 592 - 630)
Es_1931 Mb - Espin, T.E. 1931MNRAS..91..294E
Es_1931 MNRAS 91, 294, 1931 (ES 2401 - 2444, MLB 631 - 673)
Es_1932a Mb - Espin, T.E. 1932MNRAS..92..214E
Es_1932a MNRAS 92, 214, 1932 (ES 2445 - 2543, MLB 674 - 732)
Es_1932B Mb - Espin, T.E. 1932QB821.A43......
Es_1932B cited in ADS (Aitken Double Star Cat.), 1932
Es_1933 Mb - Espin, T.E. 1933MNRAS..93..192E
Es_1933 MNRAS 93, 192, 1933 (ES 2544 - 2575, MLB 733 - 806)
Es_1937A Mb - Espin, T.E. 1937AnLei..18....1S
Es_1937A cited by Strand (Ann. Sterrew. Leiden 18, 1937)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20421+5013 ES 91 BC 2003 9 247 14.7 9.70 9.80 D 204203.89+501344.8
20421+5013 ES 91 BC 2010 11 239 16.2 11.05 11.66 204203.89+501344.8
20421+5013 ES 91 BC 2016 12 247 14.8 11.05 11.66 204203.89+501344.8
20421+5013 ES 91 BC 2018 13 248 14.8 11.05 11.66 204203.89+501344.8

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

 
 
WDS 20421+5013 ES 91 BC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20421+5013 ES 91 BC : MEASURES
 
 
No records found.

 
 
WDS 20421+5013 : VIRTUAL EYEPIECE
 
 

20421+5013 ES 91A mag 11.54 20421+5013 ES 91B sep 4.4 P.A. 190.10 mag 11.05 20421+5013 ES 91C sep 13.8 P.A. 221.90 mag 11.66 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 20421+5013 : ALADIN DSS IMAGE @ 20h 42m 03.89s +50° 13' 44.8"
 
 
 
 
WDS 20421+5013 ES 91 BC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20421+5013 ES 91BC distance=0' 20421+5013 ES 91AB distance=1' 20421+5013 ES 91AC distance=1' 20422+5020 BU 675AB distance=7' 20422+5020 BU 675AC distance=7' 20422+5020 BU 675AD distance=7' 20422+5020 BU 675AE distance=7' 20449+5023 SKF2395 distance=29' 20441+5043 LEP 171 distance=35' 20383+5023 HU 588AB distance=37' 20380+5025 DAM 294 distance=41' 20378+5018 DAM 293 distance=41' 20457+4951 TDT2521 distance=43' 20457+5040 STT 412BC distance=44' 20465+5005 HDS2958 distance=44' 20457+5040 STT 412AB distance=44' 20457+5040 STT 412AC distance=44' 20466+5004 HDS2959 distance=45' 20376+5028 L 49 distance=45' 20418+4929 HEI 910 distance=46' 20434+4923 STJ 111 distance=53' 20438+4921 HEI 911 distance=57' 20425+4916 ARG 39AB distance=58' 20425+4916 ARG 39AF distance=58' 20425+4916 ARG 39AG distance=58' 20425+4916 ARG 39BC distance=59' 20425+4916 ARG 39BD distance=59' 20425+4916 ARG 39BE distance=59' 20486+5029 BU 366AB distance=65' 20486+5029 BU 366AC distance=65' 20367+5053 HEI 879Aa,Ab distance=65' 20367+5053 HLD 39AB distance=65' 20486+5029 D 23CD distance=65' 20379+5106 KPP4397CD distance=66' 20379+5106 KPP4397BC distance=66' 20379+5106 ES 88AB distance=66' 20379+5106 KPP4397AC distance=66' 20483+5054 ES 998 distance=73' 20496+5008 ES 94AB distance=73' 20496+5008 GUI 34AD distance=73' 20347+4957 ES 2696 distance=73' 20496+5008 ES 94BC distance=74' 20406+4900 ES 509 distance=76' 20499+5036 CBL 87 distance=79' 20496+5047 HDS2968 distance=79' 20441+4856 HEI 912 distance=80' 20356+5104 TDT2400 distance=80' 20405+4855 ES 807 distance=81' 20470+4901 HDS2962 distance=87' 20349+5109 ES 990 distance=88' 20330+4950 MCA 61AB distance=91' 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 20421+5013 ES 91 BC 247 14.8
Show 20421+5013 ES 91 AB 189 4.6 1
Show 20421+5013 ES 91 AC 235 17.6 1
Show 20422+5020 BU 675 AB 102 3.3 7
Show 20422+5020 BU 675 AC 185 28.8 7
Show 20422+5020 BU 675 AD 329 33.3 7
Show 20422+5020 BU 675 AE 240 72.0 7
Show 20449+5023 SKF2395 204 4.1 29
Show 20441+5043 LEP 171 172 4.4 35
Show 20383+5023 HU 588 AB 245 2.0 37
Show 20380+5025 DAM 294 258 4.1 41
Show 20378+5018 DAM 293 286 4.8 41
Show 20457+4951 TDT2521 236 0.3 43
Show 20457+5040 STT 412 BC 186 5.0 44
Show 20465+5005 HDS2958 334 0.1 44
Show 20457+5040 STT 412 AB 279 26.0 44
Show 20457+5040 STT 412 AC 268 26.2 44
Show 20466+5004 HDS2959 21 0.5 45
Show 20376+5028 L 49 82 4.1 45
Show 20418+4929 HEI 910 201 1.6 46
Show 20434+4923 STJ 111 64 0.9 53
Show 20438+4921 HEI 911 125 2.4 57
Show 20425+4916 ARG 39 AB 184 15.4 58
Show 20425+4916 ARG 39 AF 258 34.4 58
Show 20425+4916 ARG 39 AG 341 52.4 58
Show 20425+4916 ARG 39 BC 100 35.4 59
Show 20425+4916 ARG 39 BD 241 21.1 59
Show 20425+4916 ARG 39 BE 55 44.1 59
Show 20486+5029 BU 366 AB 130 1.5 65
Show 20486+5029 BU 366 AC 105 51.1 65
Show 20367+5053 HEI 879 Aa,Ab 137 0.1 65
Show 20367+5053 HLD 39 AB 174 7.5 65
Show 20486+5029 D 23 CD 5 1.7 65
Show 20379+5106 KPP4397 CD 35 2.2 66
Show 20379+5106 KPP4397 BC 201 49.0 66
Show 20379+5106 ES 88 AB 127 7.8 66
Show 20379+5106 KPP4397 AC 193 51.7 66
Show 20483+5054 ES 998 176 3.2 73
Show 20496+5008 ES 94 AB 15 102.7 73
Show 20496+5008 GUI 34 AD 58 86.9 73
Show 20347+4957 ES 2696 147 12.2 73
Show 20496+5008 ES 94 BC 79 2.5 74
Show 20406+4900 ES 509 285 8.6 76
Show 20499+5036 CBL 87 2 25.0 79
Show 20496+5047 HDS2968 69 0.3 79
Show 20441+4856 HEI 912 201 1.7 80
Show 20356+5104 TDT2400 43 1.2 80
Show 20405+4855 ES 807 154 3.9 81
Show 20470+4901 HDS2962 222 0.1 87
Show 20349+5109 ES 990 299 2.6 88
Show 20330+4950 MCA 61 AB 233 0.1 91

 
 
WDS 20421+5013 : COMPONENTS
 
 
  A B
B pa=190.1°
sep=4.37"
 
C pa=221.9°
sep=13.75"
pa=234.8°
sep=10.30"
 
 
20421+5013 A
 
 
Coord arcsec 2000 204203.97+501349.1 Mag 11.54 PmRA 1.00 PmDE 80.0
 
 
20421+5013 B
 
 
Coord arcsec 2000 204203.89+501344.8 Coord calc 204203.89+501344.8 Mag 11.05 PmRA -37.00
PmDE -154.0 Calc delta mag 0.49
 
 
20421+5013 C
 
 
Coord arcsec 2000 204203.01+501338.9 Mag 11.66 PmRA -10.00 PmDE -4.0
Tycho2 3582-01142-1 Calc delta mag 0.12 Calc coord yes
Tycho2
Tycho2 3582-01142-1 Pflag RAmdeg 310.51024581 DEmdeg 50.22747504
PmRA -9.6 PmDE -6.3 E RAmdeg 135 E DEmdeg 137
E pmRA 3.1 E pmDE 3.0 EpRAm 1959.29 EpDEm 1952.64
Num 3 Q RAmdeg 1.5 Q DEmdeg 1.7 Q pmRA 1.5
Q pmDE 1.8 BTmag 12.067 E BTmag 0.114 VTmag 11.662
E VTmag 0.121 Prox 177 TYC HIP
CCDM RAdeg 310.51028028 DEdeg 50.22749028 EpRA 1990 1.81
EpDE 1990 1.76 E RAdeg 168.1 E DEdeg 181.3 Posflg
Corr 0.1