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Current system
20301+4857
BU 669 AB


Nearby doubles
18' : 20309+4913
S 755AB

21' : 20313+4913
S 756

32' : 20271+4909
ES 802

35' : 20280+4829
HU 587

40' : 20318+4933
BU 1136

40' : 20281+4822
TDT2302

44' : 20300+4940
HU 589

47' : 20281+4815
ES 803

51' : 20273+4815
TDT2286

55' : 20348+4830
ES 666

56' : 20246+4904
HEI 908

57' : 20246+4842
ES 2694

58' : 20273+4948
BVD 269

60' : 20306+4956
TDT2331

61' : 20330+4950
MCA 61AB

67' : 20341+4804
YSC 116

67' : 20320+5001
HEI 909

74' : 20334+4752
J 4

76' : 20347+4957
ES 2696

78' : 20304+5014
ES 1100

82' : 20243+4800
TDT2240

82' : 20287+4737
GRF 17

83' : 20223+4930
TDT2212

84' : 20233+4807
A 727

86' : 20311+5022
ES 1101

91' : 20387+4830
HJ 1558



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.
 
 
WDS 20301+4857 : COMPONENTS
 
 
  A B C
B pa=343.6°
sep=14.30"
 
C pa=88.2°
sep=36.64"
pa=107.2°
sep=42.54"
 
D pa=32.7°
sep=111.40"
pa=38.7°
sep=102.58"
pa=14.2°
sep=95.56"
 
 
20301+4857 A
 
 
Coord arcsec 2000 203003.53+485705.6 Mag 4.95 Spectral class B2.5IV (blue-white) PmRA 11.00
PmDE 7.0 SAO 49712 HIP 101138 Tycho2 3581-02031-1
HD 195556 HR 7844 GC 28537 BD BD+48 3142
Bayer Omega 1 Cygni Bayer name Ome1 Cyg Flamsteed 45 Cygni Flamsteed name 45 Cyg
FK5 3641
Tycho2
Tycho2 3581-02031-1 Pflag RAmdeg 307.51475117 DEmdeg 48.95156859
PmRA 10.0 PmDE 7.5 E RAmdeg 3 E DEmdeg 3
E pmRA 0.9 E pmDE 1.0 EpRAm 1991.49 EpDEm 1991.61
Num 15 Q RAmdeg 0.7 Q DEmdeg 0.7 Q pmRA 0.6
Q pmDE 0.8 BTmag 4.813 E BTmag 0.014 VTmag 4.920
E VTmag 0.009 Prox 999 TYC T HIP 101138
CCDM RAdeg 307.51471583 DEdeg 48.95155139 EpRA 1990 1.65
EpDE 1990 1.76 E RAdeg 3.3 E DEdeg 3.3 Posflg
Corr 0.1
SAO
SAO 49712 DelFlag RA1950 PmRA1950 0.0009
DE1950 PmDE1950 0.011 Vmag 4.9 SpType B3
Double code Source 70 CatNum 28537 DM BD+48 3142
DMcomp BDsup HD 195556 M HD 0
GC 28537 RA1950rad 5.36038172 DE1950rad 0.85141994 PmRA2000 0.0013
PmDE2000 0.009
Hipparcos
Catalog H HIP 101138 Proxy RAhms 20 30 03.53
DEdms +48 57 05.6 Vmag 4.94 VarFlag 1 R Vmag H
RAdeg 307.515 DEdeg 48.9515 AstroRef Plx 3.75
CCDM 20301+4857 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 195556 BD BD+48 3142
CD CP Dm number +48 3142 VIred -0.06
SpType B2.5IV R SpType Coord arcsec 2000 203003.53+485705.6
Hipparcos 2
HIP 101138 Sn 5 So 0 Nc 1
RArad 5.3671442834 DErad 0.8543657282 Plx 3.59 PmRA 10.63
PmDE 7.22 E RArad 0.16 E DErad 0.15 E Plx 0.18
E pmRA 0.18 E pmDE 0.16 Hpmag 4.9191 E Hpmag 0.0013
SHp 0.011 VA 2 BV -0.087 E BV 0.004
VI -0.06
CCDM
Ccdm 20301+4857 RComp Comp A Note1
Note2 Discov num DRAs -2.48 DDEs 5.6
R dRAs 10 Year Theta Rho
Obs 3 Vmag 4.9 Sp B3 PmNote *
PmRA 8 PmDE 8 Dm number +48 3142 Cat1 BD
Name2 +48 1640 Cat2 AGK2/3 HD 195556 M HD
ADS BDS A13932 M ADS BDS N IDS IDS 20270N4837A
HIC 101138
 
 
20301+4857 B
 
 
Coord arcsec 2000 203003.12+485719.3 Mag 12.9 Calc delta mag 7.95 Calc coord yes
CCDM
Ccdm 20301+4857 RComp Comp B Note1
Note2 Discov num BU 669 DRAs DDEs
R dRAs Year 1878 Theta 341 Rho 17.8
Obs 6 Vmag 12.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13932 M ADS BDS N IDS IDS 20270N4837B
HIC
 
 
20301+4857 C
 
 
Coord arcsec 2000 203007.25+485706.8 Mag 11.77 PmRA 9.00 PmDE -16.0
Calc delta mag 6.82 Calc coord yes
CCDM
Ccdm 20301+4857 RComp Comp C Note1
Note2 Discov num BU 669 DRAs DDEs
R dRAs Year 1878 Theta 086 Rho 56.3
Obs 8 Vmag 9.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13932 M ADS BDS N IDS IDS 20270N4837C
HIC
 
 
20301+4857 D
 
 
Coord arcsec 2000 203009.63+485839.4 Mag 11.99 PmRA -2.00 PmDE -5.0
Calc delta mag 7.04 Calc coord yes