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Doubles in session


Current system
21183+3456
BU 289 AB
HD 202974


Nearby doubles
5' : 21181+3500
SLE 383

6' : 21179+3454
STT 433AB

13' : 21173+3457
TDT2886

26' : 21186+3430
HU 769

29' : 21197+3518
SLE 386AB

34' : 21177+3423
SLE 381

38' : 21156+3512
TDT2863

38' : 21171+3530
SLE 378

40' : 21190+3418
COU 131

41' : 21159+3428
SLE 377

45' : 21214+3517
GRV 454

46' : 21206+3420
JNN 129

47' : 21192+3411
SLE 385

47' : 21203+3535
TDT2911

49' : 21217+3436
COU1334

51' : 21145+3437
HU 768

52' : 21180+3405
RAO 621

53' : 21171+3546
BU 162AB

54' : 21225+3509
POP 50

54' : 21218+3528
TDT2923

54' : 21140+3504
ES 2258

55' : 21221+3525
ES 2259

56' : 21219+3530
TDT2925

56' : 21147+3529
TDT2852

56' : 21138+3500
J 3128AB

57' : 21146+3423
SLE 374



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.

21183+3456 BU 289 AB (HD 202974)

 
 
21h 18m 18.20s +34° 55' 36.2" P.A. 128.00 sep 0.8 mag 9.13,9.66 Sp F8
 
 
Coord 2000 21183+3456 Discov num BU  289 Comp AB Coord arcsec 2000 21 18 18.20 +34 55 36.2
Date first 1874 Date last 2016 Obs 27
Pa first 140 Pa last 128 P.A. Now (θ) 128°
Sep first 1.0 Sep last 0.838 Sep. Now (ρ) 0.838"
Mag pri 9.13 Mag sec 9.66 delta mag (ΔM) 0.53 Spectral class F8 (yellow-white)
Pri motion ra +028 Sec motion ra +027
Pri motion dec +009 Sec motion dec +012
Notes
rPM=0.107 (< 0.3, Physical double)
This double is physical.
 
 
21183+3456 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 202974 71182 21 18 18 +34 55 36 BU 289 AB 2016 27 128 0.8 9.13 9.66 0.53 <===
Show 71182 21 18 18 +34 55 36 BU 289 AC 2015 15 251 13.0 9.13 13.00 3.87
Show 71182 21 18 18 +34 55 36 SLE 384 AD 2015 14 189 43.3 9.13 11.98 2.85
Show 71182 21 18 18 +34 55 36 FYM 142 AE 2015 8 94 36.7 9.13 13.50 4.37
Show 71182 21 18 18 +34 55 36 FYM 142 AF 2015 8 200 45.9 9.13 14.90 5.77
Show 71182 21 18 18 +34 55 36 FYM 142 AG 2015 8 272 68.8 9.13 13.70 4.57
Show 71182 21 18 18 +34 55 36 FYM 142 AH 2015 5 274 61.5 9.13 14.60 5.47
Show 21 18 18 +34 54 54 FYM 142 DF 2016 8 268 8.6 11.98 14.90 2.92
Show 21 18 21 +34 55 34 FYM 142 EI 2015 7 273 9.1 13.50 15.70 2.20
Show 21 18 13 +34 55 38 FYM 142 GH 2015 7 69 7.9 13.70 14.60 0.90
Ninefold system
9 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 202974 Constellation Cygnus SAO 71182 Tycho2 2711-00746-1
Gaia DR2 1867348872887304832 HD 202974