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Current system
21299+5256
STF 2803 AB
HD 204905


Nearby doubles
24' : 21315+5237
ARY 88AB

25' : 21323+5245
BU 370AB

28' : 21280+5317
HDS3055

33' : 21265+5245
BU 369AB

46' : 21322+5336
TDT3015

46' : 21254+5235
CVR 243

52' : 21251+5229
HU 592

53' : 21316+5346
CBL 94

56' : 21259+5214
CVR 244

60' : 21233+5249
TOI1361

61' : 21241+5227
ES 1006

61' : 21238+5322
KPP 810

67' : 21344+5349
GIC 167

68' : 21353+5210
HU 594AB

69' : 21373+5244
A 1700AB

70' : 21271+5151
CVR 246

71' : 21358+5343
TDT3048

78' : 21227+5214
HU 591

78' : 21224+5218
ES 2708

81' : 21378+5333
TDT3067

82' : 21367+5203
TDT3060

83' : 21372+5346
MLR 609

83' : 21211+5323
ES 139

86' : 21206+5241
MLR 644

87' : 21394+5255
SKF 349

90' : 21211+5337
CVR 240



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.

21299+5256 STF 2803 AB (HD 204905)

 
 
21h 29m 52.95s +52° 56' 01.8" P.A. 285.00 sep 25.9 mag 7.24,9.60 Sp B9.5IV-V
 
 
Coord 2000 21299+5256 Discov num STF2803 Comp AB Coord arcsec 2000 21 29 52.95 +52 56 01.8
Date first 1832 Date last 2015 Obs 32
Pa first 290 Pa last 284.6 P.A. Now (θ) 284.6°
Sep first 22.2 Sep last 25.882 Sep. Now (ρ) 25.882"
Mag pri 7.24 Mag sec 9.60 delta mag (ΔM) 2.36 Spectral class B9.5IV-V (blue-white)
Pri motion ra +006 Sec motion ra -011
Pri motion dec +004 Sec motion dec -003
Notes N (See Notes)
rPM=1.612
This double is not physical.
 
 
21299+5256 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 204905 33468 21 29 53 +52 56 02 STF 2803 AB 2015 32 285 25.9 7.24 9.60 2.36 <===
Show 33468 21 29 53 +52 56 02 GUI 35 AC 2015 15 2 87.6 7.24 9.99 2.75
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 204905 Constellation Cygnus SAO 33468 HIP 106124
Tycho2 3966-01479-1 Gaia DR2 2172660956757005184 HD 204905 GC 30120
BD BD+52 2951
 
 
WDS 21299+5256 STF 2803 AB (HD 204905) : NOTES
 
 
discov_num notes refcode
STF2803 B is BD+52@2951.
 
 
REFERENCES
 
 
refcode metd author reference
Gui1912 Ma - Guillaume, J. .
Gui1912 Travaux Lyon Obs. 4, 193, 1912
Gui1931 Ma - Guillaume, J. .
Gui1931 Bull. Obs. Lyon 13, 151, 1931
Gui1932A Ma - Guillaume, J. 1932QB821.A43......
Gui1932A cited in ADS (Aitken Double Star Cat.), 1932
STFA (F. Struve DD - Appendix list #1) ...................
STFB (F. Struve DD - Appendix list #2) ...................
StF1833A Ma - Struve, F.G.W. 1833MmRAS...5...13H
StF1833A +Mc cited by Herschel (MemRAS 5, 13, 1833)
StF1833B Ma - Struve, F.G.W. 1833AN.....10..389B
StF1833B cited by Bessel (AN 10, 389, 1833)
StF1837 Ma - Struve, F.G.W. 1837AN.....14...249
StF1837 Stellarum duplicium et multiplicium mensurae micrometricae...
StF1837 (Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837
StF1844A Ma - Struve, F.G.W. 1844QB43.S66.......
StF1844A cited by Smyth (Cycle of Celestial Objects 2, 1844)
StF1852A Ma - Struve, F.G.W. .
StF1852A cited by Bishop (Bishop Obs. Astron. Observations 1852)
StF1865A Ma - Struve, F.G.W. 1865AN.....64...81E
StF1865A cited by Engelmann (AN 64, 81, #1518, 1865)
StF1875A Ma - Struve, F.G.W. 1875AN.....85..323D
StF1875A cited by Doberck, 1875 (see Dob1875b,f,g,h)
StF1878 Ma - Struve, F.G.W. .
StF1878 Pulkova Observations 9, 1878
StF1878B Ma - Struve, F.G.W. 1878Obs.....2..239G
StF1878B cited by Gledhill (Obs 2, 239, 1878)
StF1880A Ma - Struve, F.G.W. 1880Obs.....3..535G
StF1880A cited by Gledhill (Obs 3, 535, 1880)
StF1906A Ma - Struve, F.G.W. 1906QB821.B972.....
StF1906A cited in BDS (Burnham Double Star Cat.), 1906
StF1906B Ma - Struve, F.G.W. 1906MmRAS..56....1L
StF1906B cited by Lewis (MemRAS 56, 1, 1906)
StF1922A Ma - Struve, F.G.W. 1922AN....216...49R
StF1922A cited by Rabe (AN 216, 49, 1922)
StF1932A Ma - Struve, F.G.W. 1932QB821.A43......
StF1932A cited in ADS (Aitken Double Star Cat.), 1932
StF2002 - - Weis, J.
StF2002 F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue
StF2002 USNO Library : QB 821 .S8 W49 2002
StF2022 - - email note from Jan Weis: 6 July 2022
StF9999 Ma - Struve, F.G.W. ...................
StF9999 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
21299+5256 STF2803 AB 2002 27 285 25.6 7.24 9.60 B9.5IV-V N D 212952.95+525601.8
21299+5256 STF2803 AB 2003 29 285 25.7 7.24 9.60 B9.5IV-V N D 212952.95+525601.8
21299+5256 STF2803 AB 2012 30 285 25.7 7.24 9.60 B9.5IV-V N D 212952.95+525601.8
21299+5256 STF2803 AB 2015 30 285 25.9 7.24 9.60 B9.5IV-V N 212952.95+525601.8

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

 
 
WDS 21299+5256 STF 2803 AB (HD 204905) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21299+5256 STF 2803 AB (HD 204905) : MEASURES
 
 
No records found.

 
 
WDS 21299+5256 (HD 204905) : VIRTUAL EYEPIECE
 
 

21299+5256 STF2803A mag 7.24 Sp B9.5IV 21299+5256 STF2803B sep 16.4 P.A. 293.40 mag 9.6 Sp V 21299+5256 GUI 35C sep 87.6 P.A. 1.20 mag 9.99 Sp V 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 21299+5256 (HD 204905) : ALADIN DSS IMAGE @ 21h 29m 52.95s +52° 56' 01.8"
 
 
 
 
WDS 21299+5256 STF 2803 AB (HD 204905) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21299+5256 STF2803AB distance=0' 21315+5237 ARY 88AB distance=24' 21315+5237 ARY 88AC distance=24' 21315+5237 ARY 88AD distance=24' 21323+5245 A 1698BC distance=25' 21323+5245 A 1698BD distance=25' 21323+5245 BU 370AB distance=25' 21280+5317 HDS3055 distance=28' 21265+5245 BU 369AB distance=33' 21265+5245 BU 369AC distance=33' 21265+5245 BU 369AD distance=33' 21322+5336 TDT3015 distance=46' 21254+5235 CVR 243 distance=46' 21251+5229 HU 592 distance=52' 21316+5346 CBL 94 distance=53' 21259+5214 CVR 244 distance=56' 21233+5249 TOI1361 distance=60' 21241+5227 ES 1006 distance=61' 21238+5322 KPP 810 distance=61' 21344+5349 GIC 167 distance=67' 21353+5210 HU 594AB distance=68' 21353+5210 HU 594AC distance=68' 21373+5244 A 1700BD distance=68' 21373+5244 A 1700AB distance=69' 21373+5244 A 1700AC distance=69' 21373+5244 ABH 147AE distance=69' 21373+5244 ABH 147AF distance=69' 21373+5244 ABH 147AG distance=69' 21271+5151 CVR 246 distance=70' 21358+5343 TDT3048 distance=71' 21297+5139 KPP 690BC distance=77' 21227+5214 HU 591 distance=78' 21224+5218 ES 2708 distance=78' 21378+5333 TDT3067 distance=81' 21367+5203 TDT3060 distance=82' 21372+5346 MLR 609 distance=83' 21211+5323 ES 139 distance=83' 21206+5241 MLR 644 distance=86' 21394+5255 SKF 349 distance=87' 21211+5337 CVR 240 distance=90' 21200+5259 STF2789AB distance=90' 21200+5259 STF2789AC distance=90' 21338+5419 HDS3069 distance=90' 21375+5157 TDT3065 distance=91' 21255+5418 A 1697 distance=91' 21197+5303 S 786 distance=93' 21199+5319 A 1695 distance=93' 21400+5316 TDS1138 distance=94' 21195+5256 A 1693 distance=94' 21376+5403 HDS3078 distance=97' 21362+5139 HDS3075 distance=97' 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 21299+5256 STF2803 AB 285 25.9
Show 21299+5256 GUI 35 AC 2 87.6
Show 21315+5237 ARY 88 AB 11 46.3 24
Show 21315+5237 ARY 88 AC 110 88.7 24
Show 21315+5237 ARY 88 AD 56 95.0 24
Show 21323+5245 A 1698 BC 4.0 25
Show 21323+5245 A 1698 BD 234 8.6 25
Show 21323+5245 BU 370 AB 325 3.4 25
Show 21280+5317 HDS3055 35 0.4 28
Show 21265+5245 BU 369 AB 31 16.0 33
Show 21265+5245 BU 369 AC 61 49.3 33
Show 21265+5245 BU 369 AD 331 25.8 33
Show 21322+5336 TDT3015 300 1.9 46
Show 21254+5235 CVR 243 319 113.1 46
Show 21251+5229 HU 592 325 0.8 52
Show 21316+5346 CBL 94 49 13.6 53
Show 21259+5214 CVR 244 112 54.4 56
Show 21233+5249 TOI1361 142 8.2 60
Show 21241+5227 ES 1006 48 8.2 61
Show 21238+5322 KPP 810 76 7.0 61
Show 21344+5349 GIC 167 45 26.8 67
Show 21353+5210 HU 594 AB 264 3.7 68
Show 21353+5210 HU 594 AC 87 59.2 68
Show 21373+5244 A 1700 BD 246 7.2 68
Show 21373+5244 A 1700 AB 296 5.0 69
Show 21373+5244 A 1700 AC 214 5.1 69
Show 21373+5244 ABH 147 AE 252 48.9 69
Show 21373+5244 ABH 147 AF 213 79.1 69
Show 21373+5244 ABH 147 AG 80 43.8 69
Show 21271+5151 CVR 246 53 69.8 70
Show 21358+5343 TDT3048 222 0.6 71
Show 21297+5139 KPP 690 BC 117 6.2 77
Show 21227+5214 HU 591 130 0.8 78
Show 21224+5218 ES 2708 40 29.9 78
Show 21378+5333 TDT3067 34 0.8 81
Show 21367+5203 TDT3060 15 4.6 82
Show 21372+5346 MLR 609 41 1.0 83
Show 21211+5323 ES 139 352 5.7 83
Show 21206+5241 MLR 644 211 1.6 86
Show 21394+5255 SKF 349 266 14.0 87
Show 21211+5337 CVR 240 21 64.4 90
Show 21200+5259 STF2789 AB 113 6.9 90
Show 21200+5259 STF2789 AC 171 133.1 90
Show 21338+5419 HDS3069 41 0.4 90
Show 21375+5157 TDT3065 88 1.9 91
Show 21255+5418 A 1697 251 3.8 91
Show 21197+5303 S 786 298 47.9 93
Show 21199+5319 A 1695 193 0.5 93
Show 21400+5316 TDS1138 98 1.1 94
Show 21195+5256 A 1693 74 2.8 94
Show 21376+5403 HDS3078 222 0.3 97

 
 
WDS 21299+5256 : COMPONENTS
 
 
  A B
B pa=293.4°
sep=16.45"
 
C pa=1.2°
sep=87.57"
pa=11.8°
sep=82.78"
 
 
21299+5256 A
 
 
Name HD 204905 Coord arcsec 2000 212952.95+525601.8 Mag 7.24 Spectral class B9.5IV (blue-white)
PmRA 6.00 PmDE 4.0 SAO 33468 HIP 106132
Tycho2 3966-01479-1 HD 204905 GC 30120 BD BD+52 2953
Tycho2
Tycho2 3966-01479-1 Pflag RAmdeg 322.47065655 DEmdeg 52.93383983
PmRA 5.9 PmDE 3.8 E RAmdeg 4 E DEmdeg 4
E pmRA 1.2 E pmDE 1.2 EpRAm 1991.43 EpDEm 1991.50
Num 11 Q RAmdeg 1.0 Q DEmdeg 1.2 Q pmRA 1.0
Q pmDE 1.2 BTmag 7.224 E BTmag 0.015 VTmag 7.240
E VTmag 0.010 Prox 256 TYC T HIP 106132
CCDM RAdeg 322.47063417 DEdeg 52.93383111 EpRA 1990 1.64
EpDE 1990 1.71 E RAdeg 4.0 E DEdeg 4.0 Posflg
Corr 0.1
SAO
SAO 33468 DelFlag RA1950 PmRA1950 0.0011
DE1950 PmDE1950 0.016 Vmag 7.2 SpType A0
Double code Source 70 CatNum 30120 DM BD+52 2953
DMcomp BDsup HD 204905 M HD 0
GC 30120 RA1950rad 5.62091252 DE1950rad 0.92002848 PmRA2000 0.0014
PmDE2000 0.013
Hipparcos
Catalog H HIP 106132 Proxy RAhms 21 29 52.95
DEdms +52 56 01.8 Vmag 7.25 VarFlag R Vmag H
RAdeg 322.471 DEdeg 52.9338 AstroRef Plx 5.51
CCDM 21299+5256 N CCDM I Nsys 2 Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD 204905 BD BD+52 2953
CD CP Dm number +52 2953 VIred 0
SpType A0 R SpType Coord arcsec 2000 212952.95+525601.8
Hipparcos 2
HIP 106132 Sn 5 So 0 Nc 1
RArad 5.6281742541 DErad 0.9238696312 Plx 5.49 PmRA 5.48
PmDE 3.6 E RArad 0.39 E DErad 0.36 E Plx 0.45
E pmRA 0.41 E pmDE 0.41 Hpmag 7.2552 E Hpmag 0.0011
SHp 0.011 VA 0 BV 0.117 E BV 0.14
VI 0
CCDM
Ccdm 21299+5256 RComp Comp A Note1
Note2 Discov num DRAs -1.06 DDEs 0.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.2 Sp A0 PmNote *
PmRA -2 PmDE -22 Dm number +52 2953 Cat1 BD
Name2 +52 1500 Cat2 AGK2/3 HD 204905 M HD
ADS BDS A15035 M ADS BDS N IDS IDS 21266N5229A
HIC 106132
 
 
21299+5256 B
 
 
Coord arcsec 2000 212951.28+525608.3 Mag 9.6 Spectral class V PmRA -11.00
PmDE -3.0 HIP 106124 BD BD+52 2951 Calc delta mag 2.36
Calc coord yes
Hipparcos
Catalog H HIP 106124 Proxy RAhms 21 29 50.19
DEdms +52 56 07.9 Vmag 9.48 VarFlag R Vmag H
RAdeg DEdeg AstroRef Plx
CCDM 21299+5256 N CCDM I Nsys 2 Ncomp
MultFlag Source Qual S M HIP
Theta Rho HD BD BD+52 2951
CD CP Dm number +52 2951 VIred 0.67
SpType F8 R SpType Coord arcsec 2000 212950.19+525607.9
CCDM
Ccdm 21299+5256 RComp Comp B Note1
Note2 Discov num STF2803 DRAs -3.82 DDEs 7.8
R dRAs 10 Year 1914 Theta 287 Rho 24.8
Obs 8 Vmag 10.3 Sp PmNote *
PmRA -20 PmDE -12 Dm number +52 2951 Cat1 BD
Name2 +52 1499 Cat2 AGK2/3 HD M HD
ADS BDS A15035 M ADS BDS N IDS IDS 21266N5229B
HIC 106124
 
 
21299+5256 C
 
 
Coord arcsec 2000 212953.15+525729.3 Mag 9.99 Spectral class V PmRA 33.00
PmDE 14.0 Calc delta mag 2.75 Calc coord yes