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Doubles in session


Current system
21432+3801
BLL 55 AB
RV Cyg


Nearby doubles
11' : 21440+3757
SEI1533

15' : 21432+3815
DAM 232

17' : 21434+3817
S 799AB

21' : 21450+3800
LDS1054

21' : 21438+3742
TDT3122

21' : 21436+3822
ES 2522

27' : 21415+3817
SEI1532

28' : 21429+3734
ES 2521AB

30' : 21457+3800
DAM1461

30' : 21408+3806
TDS1140

36' : 21412+3735
TDT3109

41' : 21399+3813
ES 2066

42' : 21466+3815
COU1639

43' : 21398+3749
A 1444

47' : 21436+3715
TDS1143

50' : 21421+3848
ALI 980

52' : 21471+3737
GRV 504

52' : 21405+3720
ES 2067

56' : 21403+3843
ALI 979

58' : 21384+3808
TDT3073

58' : 21453+3853
TDT3139

59' : 21386+3822
TDT3078

59' : 21464+3847
MLB 961

60' : 21484+3806
ALI 694

64' : 21429+3904
GRV 496

68' : 21378+3739
SEI1527AB



Selections
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Neglected List I
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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21432+3801 BLL 55 AB (RV Cyg)

 
 
21h 43m 16.33s +38° 01' 03.0" P.A. 117.00 sep 142.4 mag 8.43,10.92 Sp CII dist. 1562.5 pc (5096.88 l.y.)
 
 
Coord 2000 21432+3801 Discov num BLL  55 Comp AB Coord arcsec 2000 21 43 16.33 +38 01 03.0
Date first 1878 Date last 2015 Obs 10
Pa first 118 Pa last 116.8 P.A. Now (θ) 116.8°
Sep first 140.9 Sep last 142.38 Sep. Now (ρ) 142.38"
Mag pri 8.43 Mag sec 10.92 delta mag (ΔM) 2.49 Spectral class CII (red carbon star)
Pri motion ra -006 Sec motion ra +008
Pri motion dec -008 Sec motion dec +006
Notes N (See Notes)
rPM=1.98
This double is not physical.
 
 
21432+3801 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 71642 21 43 16 +38 01 03 HDS 3094 Aa,Ab 1991 1 245 0.1 8.28 8.64 0.36
Show RV Cyg 71642 21 43 16 +38 01 03 BLL 55 AB 2015 10 117 142.4 8.43 10.92 2.49 <===
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name RV Cyg Constellation Cygnus SAO 71642 HIP 107242
Tycho2 3184-02150-1 Gaia DR2 1952830855359293312 HD 206750 GC 30416
BD BD+37 4407 Distance 1562.5 Distance ly 5096.88
 
 
WDS 21432+3801 BLL 55 AB (RV Cyg) : NOTES
 
 
discov_num notes refcode
BLL 55 A is the semiregular variable RV Cyg.
 
 
REFERENCES
 
 
refcode metd author reference
Bll1872 orb - Ball, R.S. .
Bll1872 Proc. Royal Irish Acad., June 1872
Bll1884 Ma j Ball, R.S. 1884DunOP...5....1B
Bll1884 Pub. Dunsink Obs. 5, 1, 1884
Bll1913A Ma - Ball, R.S. 1913QB811.B8.......
Bll1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Bll1932A - Ball, R.S. 1932QB821.A43......
Bll1932A cited in ADS (Aitken Double Star Cat.), 1932
HDS Hipparcos Double Star (from additional DD list) ...................
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21432+3801 BLL 55 AB 2007 6 117 142.2 8.43 10.92 CII N 214316.33+380103.0
21432+3801 BLL 55 AB 2013 8 117 143.2 8.43 10.92 CII N 214316.33+380103.0
21432+3801 BLL 55 AB 2015 10 117 142.4 8.43 10.92 CII N 214316.33+380103.0

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

 
 
WDS 21432+3801 BLL 55 AB (RV Cyg) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21432+3801 BLL 55 AB (RV Cyg) : MEASURES
 
 
No records found.

 
 
WDS 21432+3801 (RV Cyg) : VIRTUAL EYEPIECE
 
 

21432+3801 BLL 55A mag 8.43 Sp CII 21432+3801 HDS3094Ab sep 0.1 P.A. 239.40 mag 8.64 21432+3801 BLL 55B sep 118.9 P.A. 122.70 mag 10.92 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 21432+3801 (RV Cyg) : ALADIN DSS IMAGE @ 21h 43m 16.33s +38° 01' 03.0"
 
 
 
 
WDS 21432+3801 BLL 55 AB (RV Cyg) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21432+3801 BLL 55AB distance=0' 21440+3757 SEI1533 distance=11' 21432+3815 DAM 232 distance=15' 21434+3817 KUI 109Aa,Ab distance=17' 21434+3817 S 799AB distance=17' 21434+3817 S 799AC distance=17' 21434+3817 S 799BD distance=18' 21450+3800 LDS1054 distance=21' 21438+3742 TDT3122 distance=21' 21436+3822 ES 2522 distance=21' 21415+3817 SEI1532 distance=27' 21429+3734 ES 2521AB distance=28' 21429+3734 ES 2521AC distance=28' 21457+3800 DAM1461 distance=30' 21408+3806 TDS1140 distance=30' 21412+3735 TDT3109 distance=36' 21399+3813 ES 2066 distance=41' 21466+3815 COU1639 distance=42' 21398+3749 A 1444 distance=43' 21436+3715 TDS1143 distance=47' 21421+3848 ALI 980 distance=50' 21471+3737 GRV 504 distance=52' 21405+3720 ES 2067 distance=52' 21403+3843 ALI 979 distance=56' 21384+3808 TDT3073 distance=58' 21453+3853 TDT3139 distance=58' 21386+3822 TDT3078 distance=59' 21464+3847 MLB 961 distance=59' 21484+3806 ALI 694 distance=60' 21429+3904 GRV 496 distance=64' 21378+3739 SEI1527AB distance=68' 21378+3739 MBR 1AC distance=68' 21403+3858 MLB 787 distance=68' 21402+3703 SEI1531 distance=69' 21374+3810 GRV 487 distance=70' 21387+3848 ALI 977 distance=72' 21493+3816 A 1448 distance=73' 21396+3650 SEI1530 distance=84' 21502+3750 ES 1996 distance=84' 21376+3712 ES 2065 distance=84' 21492+3849 TDT3176 distance=85' 21360+3803 GRV 483 distance=86' 21400+3919 ALI 978 distance=87' 21383+3906 ALI 976 distance=88' 21358+3755 GRV 482 distance=89' 21382+3655 TDT3069 distance=90' 21481+3911 TDT3162 distance=90' 21413+3928 BU 274 distance=91' 21445+3933 A 1447 distance=92' 21512+3741 TDT3193 distance=96' 21383+3917 GRV 488 distance=96' 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 21432+3801 HDS3094 Aa,Ab 245 0.1
Show 21432+3801 BLL 55 AB 117 142.4
Show 21440+3757 SEI1533 13 25.7 11
Show 21432+3815 DAM 232 299 8.3 15
Show 21434+3817 KUI 109 Aa,Ab 142 1.9 17
Show 21434+3817 S 799 AB 60 149.5 17
Show 21434+3817 S 799 AC 318 135.3 17
Show 21434+3817 S 799 BD 254 34.0 18
Show 21450+3800 LDS1054 8 127.0 21
Show 21438+3742 TDT3122 280 0.6 21
Show 21436+3822 ES 2522 101 4.0 21
Show 21415+3817 SEI1532 139 5.1 27
Show 21429+3734 ES 2521 AB 200 8.2 28
Show 21429+3734 ES 2521 AC 93 16.5 28
Show 21457+3800 DAM1461 190 1.7 30
Show 21408+3806 TDS1140 191 1.0 30
Show 21412+3735 TDT3109 59 0.6 36
Show 21399+3813 ES 2066 224 5.4 41
Show 21466+3815 COU1639 204 1.8 42
Show 21398+3749 A 1444 82 1.1 43
Show 21436+3715 TDS1143 180 0.9 47
Show 21421+3848 ALI 980 139 8.9 50
Show 21471+3737 GRV 504 21 53.5 52
Show 21405+3720 ES 2067 227 6.8 52
Show 21403+3843 ALI 979 5 9.8 56
Show 21384+3808 TDT3073 334 1.1 58
Show 21453+3853 TDT3139 65 0.5 58
Show 21386+3822 TDT3078 157 0.7 59
Show 21464+3847 MLB 961 4 6.5 59
Show 21484+3806 ALI 694 163 6.4 60
Show 21429+3904 GRV 496 72 29.9 64
Show 21378+3739 SEI1527 AB 332 25.5 68
Show 21378+3739 MBR 1 AC 89 14.5 68
Show 21403+3858 MLB 787 351 5.4 68
Show 21402+3703 SEI1531 20 2.9 69
Show 21374+3810 GRV 487 201 74.8 70
Show 21387+3848 ALI 977 221 11.6 72
Show 21493+3816 A 1448 331 4.7 73
Show 21396+3650 SEI1530 160 19.9 84
Show 21502+3750 ES 1996 337 2.3 84
Show 21376+3712 ES 2065 4 3.9 84
Show 21492+3849 TDT3176 1 2.3 85
Show 21360+3803 GRV 483 237 21.8 86
Show 21400+3919 ALI 978 14 13.3 87
Show 21383+3906 ALI 976 173 12.8 88
Show 21358+3755 GRV 482 188 49.3 89
Show 21382+3655 TDT3069 148 0.5 90
Show 21481+3911 TDT3162 146 2.0 90
Show 21413+3928 BU 274 180 3.7 91
Show 21445+3933 A 1447 243 0.4 92
Show 21512+3741 TDT3193 212 1.2 96

 
 
WDS 21432+3801 : COMPONENTS
 
 
  A Ab
Ab pa=239.4°
sep=0.12"
 
B pa=122.7°
sep=118.94"
pa=122.6°
sep=119.00"
 
 
21432+3801 A
 
 
Var name RV Cyg Coord arcsec 2000 214316.33+380103.0 Mag 8.43 Spectral class CII (red carbon star)
PmRA -6.00 PmDE -8.0 SAO 71642 HIP 107242
Tycho2 3184-02150-1 HD 206750 GC 30416 BD BD+37 4407
Tycho2
Tycho2 3184-02150-1 Pflag RAmdeg 325.81803853 DEmdeg 38.01750229
PmRA -4.8 PmDE -3.6 E RAmdeg 7 E DEmdeg 6
E pmRA 2.0 E pmDE 1.8 EpRAm 1991.34 EpDEm 1991.41
Num 7 Q RAmdeg 1.1 Q DEmdeg 1.5 Q pmRA 1.1
Q pmDE 1.4 BTmag 13.753 E BTmag 0.306 VTmag 8.433
E VTmag 0.011 Prox 593 TYC T HIP 107242
CCDM AC RAdeg 325.81805306 DEdeg 38.01751111 EpRA 1990 1.56
EpDE 1990 1.71 E RAdeg 7.2 E DEdeg 6.4 Posflg P
Corr 0.2
SAO
SAO 71642 DelFlag RA1950 PmRA1950 -0.0001
DE1950 PmDE1950 -0.004 Vmag 7.1 SpType N5
Double code Source 70 CatNum 30416 DM BD+37 4407
DMcomp BDsup HD 206750 M HD 0
GC 30416 RA1950rad 5.67755653 DE1950rad 0.65952556 PmRA2000 0.0001
PmDE2000 -0.007
Hipparcos
Catalog H HIP 107242 Proxy H RAhms 21 43 16.33
DEdms +38 01 03.0 Vmag 7.67 VarFlag 2 R Vmag H
RAdeg 325.818 DEdeg 38.0175 AstroRef * Plx 0.41
CCDM 21434+3801 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual B M HIP AC
Theta 245 Rho 0.149 HD 206750 BD BD+37 4407
CD CP Dm number +37 4407 VIred 2.45
SpType C6II R SpType Coord arcsec 2000 214316.33+380103.0
Hipparcos 2
HIP 107242 Sn 55 So 3 Nc 2
RArad 5.6865978757 DErad 0.663530712 Plx 0.64 PmRA -7.06
PmDE -7 E RArad 0.37 E DErad 0.45 E Plx 0.66
E pmRA 0.4 E pmDE 0.5 Hpmag 7.6924 E Hpmag 0.0073
SHp 0.106 VA 1 BV 2.45 E BV 0.51
VI 2.45
 
 
21432+3801 Ab
 
 
Coord arcsec 2000 214316.32+380102.9 Mag 8.64 Calc delta mag 0.36 Calc coord yes
 
 
21432+3801 B
 
 
Coord arcsec 2000 214324.80+375958.8 Mag 10.92 PmRA 8.00 PmDE 6.0
Calc delta mag 2.64 Calc coord yes