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Doubles in session


Current system
21185+8021
STF 2801
HD 204129


Nearby doubles
31' : 21070+8030
LOC 479

38' : 21223+7945
MLR 246

40' : 21066+8048
TOK 632

47' : 21249+7938
LOC 489

53' : 21390+8002
LDS1958

53' : 21157+8114
MLR 245

62' : 21118+8121
LOC 571AB

67' : 21060+8121
PKO 31

73' : 21147+8133
LOC 478

78' : 21010+7919
MLR 244

79' : 21060+8134
LOC 480

81' : 21217+7902
UC 4456

82' : 21196+8143
AZC 180

86' : 21290+7901
TDT2985

97' : 21021+7855
LOC 477

106' : 21156+7836
STF2796

109' : 21164+8210
LDS1949

109' : 21170+8210
LOC 482

115' : 21278+7830
LOC 487

122' : 21271+7822
UC 4469

122' : 21037+7827
KPP4222

130' : 20592+7823
CON 38

130' : 21176+8231
STF2807

138' : 21202+7804
KPP4234

148' : 21288+7756
HU 771

152' : 21089+7752
LOC 476



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.

21185+8021 STF 2801 (HD 204129)

 
 
21h 18m 31.05s +80° 21' 12.5" P.A. 271.00 sep 2.1 mag 7.87,8.62 Sp F6V dist. 82.24 pc (268.27 l.y.)
 
 
Coord 2000 21185+8021 Discov num STF2801 Comp Coord arcsec 2000 21 18 31.05 +80 21 12.5
Date first 1832 Date last 2019 Obs 78
Pa first 273 Pa last 271 P.A. Now (θ) 271°
Sep first 1.4 Sep last 2.094 Sep. Now (ρ) 2.094"
Mag pri 7.87 Mag sec 8.62 delta mag (ΔM) 0.75 Spectral class F6V (yellow-white)
Pri motion ra +160 Sec motion ra +160
Pri motion dec +114 Sec motion dec +114
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 204129 Constellation Cepheus SAO 3547 HIP 105190
Tycho2 4594-01449-1 Gaia DR2 2297475485208713472 HD 204129 GC 29921
BD BD+79 701 Distance 82.24 Distance ly 268.27
 
 
WDS 21185+8021 STF 2801 (HD 204129) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
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
21185+8021 STF2801 2001 71 272 2.0 7.87 8.62 F6V D 211831.05+802112.5
21185+8021 STF2801 2011 72 270 2.1 7.87 8.62 F6V 211831.05+802112.5
21185+8021 STF2801 2016 73 272 2.1 7.87 8.62 F6V 211831.05+802112.5
21185+8021 STF2801 2019 77 272 2.1 7.87 8.62 F6V 211831.05+802112.5

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

 
 
WDS 21185+8021 STF 2801 (HD 204129) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21185+8021 STF 2801 (HD 204129) : MEASURES
 
 
No records found.

 
 
WDS 21185+8021 (HD 204129) : VIRTUAL EYEPIECE
 
 

21185+8021 STF2801A mag 7.87 Sp F6V 21185+8021 STF2801B sep 0.3 P.A. 275.90 mag 8.62 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 21185+8021 (HD 204129) : ALADIN DSS IMAGE @ 21h 18m 31.05s +80° 21' 12.5"
 
 
 
 
WDS 21185+8021 STF 2801 (HD 204129) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21185+8021 STF2801 distance=1' 21070+8030 LOC 479 distance=31' 21223+7945 MLR 246 distance=38' 21066+8048 TOK 632 distance=40' 21249+7938 LOC 489 distance=47' 21390+8002 LDS1958 distance=53' 21157+8114 MLR 245 distance=53' 21118+8121 LOC 571BC distance=62' 21118+8121 LOC 571AB distance=62' 21118+8121 LOC 571AC distance=62' 21207+7916 LDS1950AC distance=65' 21060+8121 PKO 31 distance=67' 21147+8133 LOC 478 distance=73' 21010+7919 MLR 244 distance=78' 21060+8134 LOC 480 distance=79' 21217+7902 UC 4456 distance=81' 21196+8143 AZC 180 distance=82' 21290+7901 TDT2985 distance=86' 21021+7855 LOC 477 distance=97' 21156+7836 STF2796 distance=106' 21164+8210 LDS1949 distance=109' 21170+8210 LOC 482 distance=109' 21278+7830 LOC 487 distance=115' 21271+7822 UC 4469 distance=122' 21037+7827 KPP4222 distance=122' 20592+7823 CON 38 distance=130' 21176+8231 STF2807 distance=130' 21202+7804 KPP4234 distance=138' 21288+7756 HU 771 distance=148' 21089+7752 LOC 476 distance=152' 21370+8255 STF2837 distance=160' 21276+7744 LOC 486 distance=160' 21354+8300 LDS1956 distance=163' 21341+7740 LOC 484 distance=168' 21239+8317 HDS3049 distance=177' 21322+8316 TDT3014 distance=178' 21246+7720 LDS1951 distance=182' 21092+7719 LOC 474 distance=185' 21087+7718 LOC 475 distance=186' 21236+8337 LOC 491 distance=196' 21121+7700 LOC 570AB distance=203' 21121+7700 LOC 570AC distance=203' 21121+7700 LOC 570BC distance=203' 21175+7658 LDS1948 distance=204' 21159+7649 LOC 472 distance=213' 21140+7646 LDS1946 distance=215' 21105+8356 LOC 481 distance=216' 21066+7648 LOC 473 distance=217' 21168+7642 LDS1947 distance=220' 21248+7636 LDS1952 distance=226' 21210+8413 MLR 247 distance=233' 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 21185+8021 STF2801 271 2.1 1
Show 21070+8030 LOC 479 209 3.5 31
Show 21223+7945 MLR 246 47 3.1 38
Show 21066+8048 TOK 632 53 999.9 40
Show 21249+7938 LOC 489 31 1.5 47
Show 21390+8002 LDS1958 206 8.5 53
Show 21157+8114 MLR 245 41 1.2 53
Show 21118+8121 LOC 571 BC 259 13.6 62
Show 21118+8121 LOC 571 AB 87 12.7 62
Show 21118+8121 LOC 571 AC 199 2.1 62
Show 21207+7916 LDS1950 AC 287 5.3 65
Show 21060+8121 PKO 31 119 9.6 67
Show 21147+8133 LOC 478 333 1.5 73
Show 21010+7919 MLR 244 188 2.5 78
Show 21060+8134 LOC 480 285 3.1 79
Show 21217+7902 UC 4456 353 30.2 81
Show 21196+8143 AZC 180 6 52.1 82
Show 21290+7901 TDT2985 212 0.5 86
Show 21021+7855 LOC 477 275 3.4 97
Show 21156+7836 STF2796 42 26.7 106
Show 21164+8210 LDS1949 106 15.4 109
Show 21170+8210 LOC 482 75 1.7 109
Show 21278+7830 LOC 487 256 2.1 115
Show 21271+7822 UC 4469 188 9.1 122
Show 21037+7827 KPP4222 264 2.0 122
Show 20592+7823 CON 38 237 2.5 130
Show 21176+8231 STF2807 310 1.8 130
Show 21202+7804 KPP4234 212 3.6 138
Show 21288+7756 HU 771 193 2.6 148
Show 21089+7752 LOC 476 53 1.2 152
Show 21370+8255 STF2837 269 3.2 160
Show 21276+7744 LOC 486 337 4.2 160
Show 21354+8300 LDS1956 351 62.2 163
Show 21341+7740 LOC 484 235 10.4 168
Show 21239+8317 HDS3049 339 0.3 177
Show 21322+8316 TDT3014 217 1.6 178
Show 21246+7720 LDS1951 347 2.4 182
Show 21092+7719 LOC 474 350 10.6 185
Show 21087+7718 LOC 475 324 5.3 186
Show 21236+8337 LOC 491 64 1.1 196
Show 21121+7700 LOC 570 AB 109 24.0 203
Show 21121+7700 LOC 570 AC 109 24.5 203
Show 21121+7700 LOC 570 BC 83 0.6 203
Show 21175+7658 LDS1948 305 8.7 204
Show 21159+7649 LOC 472 108 3.2 213
Show 21140+7646 LDS1946 35 15.1 215
Show 21105+8356 LOC 481 15 21.0 216
Show 21066+7648 LOC 473 147 3.6 217
Show 21168+7642 LDS1947 319 165.7 220
Show 21248+7636 LDS1952 76 190.2 226
Show 21210+8413 MLR 247 301 2.1 233

 
 
WDS 21185+8021 : COMPONENTS
 
 
  A
B pa=275.9°
sep=0.35"
 
 
21185+8021 A
 
 
Componente originario normalizzato AB Name HD 204129 Coord arcsec 2000 211831.05+802112.5 Mag 7.87
Spectral class F6V (yellow-white) PmRA 160.00 PmDE 114.0 SAO 3547
HIP 105190 Tycho2 4594-01449-1 HD 204129 GC 29921
BD BD+79 701
Tycho2
Tycho2 4594-01449-1 Pflag P RAmdeg 319.62939463 DEmdeg 80.35348566
PmRA 160.3 PmDE 113.6 E RAmdeg 5 E DEmdeg 5
E pmRA 1.5 E pmDE 1.6 EpRAm 1991.63 EpDEm 1991.61
Num 6 Q RAmdeg 2.6 Q DEmdeg 2.6 Q pmRA 2.7
Q pmDE 2.6 BTmag 8.409 E BTmag 0.016 VTmag 7.871
E VTmag 0.011 Prox 20 TYC T HIP 105190
CCDM A RAdeg 319.62804361 DEdeg 80.35322111 EpRA 1990 1.74
EpDE 1990 1.72 E RAdeg 5.0 E DEdeg 5.4 Posflg D
Corr 0.1
SAO
SAO 3547 DelFlag RA1950 PmRA1950 0.06
DE1950 PmDE1950 0.107 Vmag 7.3 SpType F8
Double code Source 70 CatNum 29921 DM BD+79 701
DMcomp BDsup HD 204129 M HD 0
GC 29921 RA1950rad 5.58538551 DE1950rad 1.39869417 PmRA2000 0.0609
PmDE2000 0.105
Hipparcos
Catalog H HIP 105190 Proxy H RAhms 21 18 30.70
DEdms +80 21 11.5 Vmag 7.35 VarFlag R Vmag G
RAdeg 319.628 DEdeg 80.3532 AstroRef A Plx 11.8
CCDM 21185+8021 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 271 Rho 2.064 HD 204129 BD BD+79 701
CD CP Dm number +79 701 VIred 0.58
SpType F6V R SpType Coord arcsec 2000 211830.70+802111.5
Hipparcos 2
HIP 105190 Sn 15 So 3 Nc 2
RArad 5.5785598083 DErad 1.4024280348 Plx 12.16 PmRA 160.06
PmDE 106.41 E RArad 0.63 E DErad 0.44 E Plx 0.55
E pmRA 0.84 E pmDE 0.5 Hpmag 7.5017 E Hpmag 0.0008
SHp 0.01 VA 0 BV 0.509 E BV 0.012
VI 0.58
CCDM
Ccdm 21185+8021 RComp Comp A Note1
Note2 Discov num DRAs 0.65 DDEs 12.5
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.8 Sp F8 PmNote *
PmRA 148 PmDE 109 Dm number +79 701 Cat1 BD
Name2 +80 453 Cat2 AGK2/3 HD 204129 M HD
ADS BDS A14916 M ADS BDS N IDS IDS 21215N7955A
HIC 105190
 
 
21185+8021 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 211830.91+802112.5 Mag 8.62 PmRA 160.00
PmDE 114.0 Tycho2 4594-01449-2 Calc delta mag 0.75 Calc coord yes
Tycho2
Tycho2 4594-01449-2 Pflag P RAmdeg 319.62939463 DEmdeg 80.35348566
PmRA 160.3 PmDE 113.6 E RAmdeg 5 E DEmdeg 5
E pmRA 1.5 E pmDE 1.6 EpRAm 1991.63 EpDEm 1991.61
Num 6 Q RAmdeg 2.6 Q DEmdeg 2.6 Q pmRA 2.7
Q pmDE 2.6 BTmag 9.174 E BTmag 0.019 VTmag 8.615
E VTmag 0.014 Prox 20 TYC T HIP 105190
CCDM B RAdeg 319.62465611 DEdeg 80.35323361 EpRA 1990 1.76
EpDE 1990 1.71 E RAdeg 7.5 E DEdeg 8.5 Posflg D
Corr 0.1
CCDM
Ccdm 21185+8021 RComp Comp B Note1
Note2 Discov num STF2801 DRAs DDEs
R dRAs Year 1954 Theta 269 Rho 1.9
Obs 99 Vmag 8.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14916 M ADS BDS N IDS IDS 21215N7955B
HIC 105190