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Doubles in session


Current system
21112+7404
STF 2784
HD 202506


Nearby doubles
13' : 21138+7409
CBL 91

25' : 21087+7342
OSO 141

30' : 21113+7334
CRB 209

49' : 20597+7417
A 879

54' : 21002+7432
CBL 530

62' : 21057+7501
TDT2739

70' : 20593+7455
A 878

71' : 21270+7339
ZUC 15

78' : 21012+7258
A 880

81' : 21220+7257
TDT2926

83' : 21291+7330
SHN 251

85' : 21309+7342
MLB 425

103' : 20515+7304
LDS1941

105' : 21276+7247
LDS1954

111' : 21257+7233
HJ 3035AB

113' : 20592+7224
MLB 423

121' : 21248+7551
NSN 744

123' : 20550+7547
LDS1942

124' : 21040+7604
SLW1229

128' : 21233+7207
LSC 98

132' : 21267+7211
TDT2971

136' : 21121+7619
STT 436

140' : 20562+7611
UC 4336

141' : 21067+7623
KPP1325

144' : 21114+7140
OSO 143

159' : 20571+7138
TDT2652



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.

21112+7404 STF 2784 (HD 202506)

 
 
21h 11m 09.19s +74° 03' 30.6" P.A. 345.00 sep 14.3 mag 9.09,10.84 Sp A1V dist. 170.65 pc (556.66 l.y.)
 
 
Coord 2000 21112+7404 Discov num STF2784 Comp Coord arcsec 2000 21 11 09.19 +74 03 30.6
Date first 1831 Date last 2015 Obs 26
Pa first 351 Pa last 345.1 P.A. Now (θ) 345.1°
Sep first 15.0 Sep last 14.28 Sep. Now (ρ) 14.28"
Mag pri 9.09 Mag sec 10.84 delta mag (ΔM) 1.75 Spectral class A1V (white)
Pri motion ra +013 Sec motion ra +013
Pri motion dec +011 Sec motion dec +011
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 202506 Constellation Cepheus SAO 9983 HIP 104584
Tycho2 4472-00906-1 Gaia DR2 2276777664148214656 HD 202506 GC 29678
BD BD+73 926 Distance 170.65 Distance ly 556.66
 
 
WDS 21112+7404 STF 2784 (HD 202506) : 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
21112+7404 STF2784 2000 16 346 14.3 9.09 10.84 A1V D 211109.19+740330.6
21112+7404 STF2784 2010 17 346 14.4 9.09 10.84 A1V D 211109.19+740330.6
21112+7404 STF2784 2015 19 345 14.3 9.09 10.84 A1V 211109.19+740330.6

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

 
 
WDS 21112+7404 STF 2784 (HD 202506) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21112+7404 STF 2784 (HD 202506) : MEASURES
 
 
No records found.

 
 
WDS 21112+7404 (HD 202506) : VIRTUAL EYEPIECE
 
 

21112+7404 STF2784A mag 9.09 Sp A1V 21112+7404 STF2784B sep 13.8 P.A. 355.80 mag 10.84 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 21112+7404 (HD 202506) : ALADIN DSS IMAGE @ 21h 11m 09.19s +74° 03' 30.6"
 
 
 
 
WDS 21112+7404 STF 2784 (HD 202506) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21112+7404 STF2784 distance=1' 21138+7409 CBL 91 distance=13' 21087+7342 OSO 141 distance=25' 21113+7334 CRB 209 distance=30' 20597+7417 A 879 distance=49' 21002+7432 CBL 530 distance=54' 21057+7501 TDT2739 distance=62' 20593+7455 A 878 distance=70' 21270+7339 ZUC 15 distance=71' 21012+7258 A 880 distance=78' 21220+7257 TDT2926 distance=81' 21291+7330 SHN 251 distance=83' 21309+7342 MLB 425 distance=85' 20515+7304 LDS1941 distance=103' 21276+7247 LDS1954 distance=105' 21257+7233 HJ 3035AB distance=111' 21257+7233 HJ 3035AC distance=111' 20592+7224 MLB 423 distance=113' 21248+7551 NSN 744 distance=121' 20550+7547 LDS1942 distance=123' 21040+7604 SLW1229 distance=124' 21233+7207 LSC 98 distance=128' 21267+7211 TDT2971 distance=132' 21121+7619 STT 436 distance=136' 20562+7611 UC 4336 distance=140' 21067+7623 KPP1325 distance=141' 21114+7140 OSO 143 distance=144' 20571+7138 TDT2652 distance=159' 21168+7642 LDS1947 distance=160' 21248+7636 LDS1952 distance=162' 21078+7123 HDS3012 distance=162' 21059+7124 LDS1945 distance=162' 21140+7646 LDS1946 distance=164' 21066+7648 LOC 473 distance=166' 21159+7649 LOC 472 distance=167' 20557+7648 UC 4331 distance=175' 21121+7700 LOC 570BC distance=177' 21175+7658 LDS1948 distance=177' 21121+7700 LOC 570AB distance=177' 21121+7700 LOC 570AC distance=177' 21201+7112 HJ 3027 distance=178' 21277+7119 LDS1953 distance=181' 20546+7653 LOC 460 distance=181' 20512+7656 SLW1227 distance=189' 21115+7050 HDS3019AB distance=194' 21087+7718 LOC 475 distance=195' 21092+7719 LOC 474 distance=196' 21045+7046 STF2771 distance=200' 21246+7720 LDS1951 distance=203' 20561+7052 TDT2640 distance=204' 21275+7028 SHR 1 distance=223' 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 21112+7404 STF2784 345 14.3 1
Show 21138+7409 CBL 91 168 32.7 13
Show 21087+7342 OSO 141 156 14.7 25
Show 21113+7334 CRB 209 143 22.0 30
Show 20597+7417 A 879 138 4.4 49
Show 21002+7432 CBL 530 285 48.6 54
Show 21057+7501 TDT2739 1 2.0 62
Show 20593+7455 A 878 48 2.9 70
Show 21270+7339 ZUC 15 167 1.9 71
Show 21012+7258 A 880 43 0.3 78
Show 21220+7257 TDT2926 74 0.6 81
Show 21291+7330 SHN 251 -1 0.5 83
Show 21309+7342 MLB 425 338 2.0 85
Show 20515+7304 LDS1941 234 1.6 103
Show 21276+7247 LDS1954 4 6.0 105
Show 21257+7233 HJ 3035 AB 127 23.2 111
Show 21257+7233 HJ 3035 AC 202 24.2 111
Show 20592+7224 MLB 423 247 5.9 113
Show 21248+7551 NSN 744 354 0.9 121
Show 20550+7547 LDS1942 346 2.7 123
Show 21040+7604 SLW1229 1 16.6 124
Show 21233+7207 LSC 98 222 0.1 128
Show 21267+7211 TDT2971 116 1.9 132
Show 21121+7619 STT 436 227 12.0 136
Show 20562+7611 UC 4336 300 22.3 140
Show 21067+7623 KPP1325 281 10.0 141
Show 21114+7140 OSO 143 277 16.6 144
Show 20571+7138 TDT2652 307 0.6 159
Show 21168+7642 LDS1947 319 165.7 160
Show 21248+7636 LDS1952 76 190.2 162
Show 21078+7123 HDS3012 190 0.9 162
Show 21059+7124 LDS1945 353 15.9 162
Show 21140+7646 LDS1946 35 15.1 164
Show 21066+7648 LOC 473 147 3.6 166
Show 21159+7649 LOC 472 108 3.2 167
Show 20557+7648 UC 4331 35 15.6 175
Show 21121+7700 LOC 570 BC 83 0.6 177
Show 21175+7658 LDS1948 305 8.7 177
Show 21121+7700 LOC 570 AB 109 24.0 177
Show 21121+7700 LOC 570 AC 109 24.5 177
Show 21201+7112 HJ 3027 128 34.2 178
Show 21277+7119 LDS1953 116 11.5 181
Show 20546+7653 LOC 460 81 6.6 181
Show 20512+7656 SLW1227 136 10.1 189
Show 21115+7050 HDS3019 AB 136 0.3 194
Show 21087+7718 LOC 475 324 5.3 195
Show 21092+7719 LOC 474 350 10.6 196
Show 21045+7046 STF2771 33 2.7 200
Show 21246+7720 LDS1951 347 2.4 203
Show 20561+7052 TDT2640 318 0.7 204
Show 21275+7028 SHR 1 141 11.5 223

 
 
WDS 21112+7404 : COMPONENTS
 
 
  A
B pa=355.8°
sep=13.84"
 
 
21112+7404 A
 
 
Componente originario normalizzato AB Name HD 202506 Coord arcsec 2000 211109.19+740330.6 Mag 9.09
Spectral class A1V (white) PmRA 13.00 PmDE 11.0 SAO 9983
HIP 104584 Tycho2 4472-00906-1 HD 202506 GC 29678
BD BD+73 926
Tycho2
Tycho2 4472-00906-1 Pflag RAmdeg 317.78829457 DEmdeg 74.05849823
PmRA 12.4 PmDE 12.6 E RAmdeg 11 E DEmdeg 11
E pmRA 1.3 E pmDE 1.3 EpRAm 1990.67 EpDEm 1990.71
Num 9 Q RAmdeg 0.6 Q DEmdeg 1.9 Q pmRA 0.7
Q pmDE 1.9 BTmag 9.838 E BTmag 0.023 VTmag 9.085
E VTmag 0.017 Prox 144 TYC T HIP 104584
CCDM A RAdeg 317.78819056 DEdeg 74.05846806 EpRA 1990 1.62
EpDE 1990 1.67 E RAdeg 10.5 E DEdeg 10.7 Posflg
Corr -0.1
SAO
SAO 9983 DelFlag RA1950 PmRA1950 0.0037
DE1950 PmDE1950 0.02 Vmag 8.9 SpType A0
Double code Source 70 CatNum 29678 DM BD+73 926
DMcomp BDsup HD 202506 M HD 0
GC 29678 RA1950rad 5.54661317 DE1950rad 1.28896379 PmRA2000 0.0042
PmDE2000 0.015
Hipparcos
Catalog H HIP 104584 Proxy RAhms 21 11 09.17
DEdms +74 03 30.5 Vmag 8.96 VarFlag R Vmag H
RAdeg 317.788 DEdeg 74.0585 AstroRef A Plx 4.53
CCDM 21112+7404 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 346 Rho 14.349 HD 202506 BD BD+73 926
CD CP Dm number +73 926 VIred 0.66
SpType A0 R SpType Coord arcsec 2000 211109.17+740330.5
Hipparcos 2
HIP 104584 Sn 15 So 3 Nc 2
RArad 5.5464501538 DErad 1.2925640222 Plx 5.86 PmRA 13.32
PmDE 15.65 E RArad 1.47 E DErad 1.64 E Plx 1.81
E pmRA 1.47 E pmDE 1.95 Hpmag 9.0981 E Hpmag 0.0124
SHp 0.051 VA 0 BV 0.688 E BV 0.026
VI 0.75
CCDM
Ccdm 21112+7404 RComp Comp A Note1
Note2 Discov num DRAs -2.74 DDEs -30.0
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.1 Sp A0 PmNote *
PmRA 15 PmDE 5 Dm number +73 926 Cat1 BD
Name2 +73 556 Cat2 AGK2/3 HD 202506 M HD
ADS BDS A14762 M ADS BDS N IDS IDS 21112N7339A
HIC 104584
 
 
21112+7404 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 211108.95+740344.4 Mag 10.84 PmRA 13.00
PmDE 11.0 Tycho2 4472-01187-1 Calc delta mag 1.75 Calc coord yes
Tycho2
Tycho2 4472-01187-1 Pflag RAmdeg 317.78469775 DEmdeg 74.06236306
PmRA 12.3 PmDE 9.1 E RAmdeg 42 E DEmdeg 46
E pmRA 1.9 E pmDE 2.0 EpRAm 1986.10 EpDEm 1986.09
Num 3 Q RAmdeg 0.2 Q DEmdeg 0.8 Q pmRA 0.2
Q pmDE 0.9 BTmag 11.727 E BTmag 0.080 VTmag 10.836
E VTmag 0.063 Prox 144 TYC T HIP 104584
CCDM B RAdeg 317.78459361 DEdeg 74.06234194 EpRA 1990 1.67
EpDE 1990 1.65 E RAdeg 42.8 E DEdeg 47.1 Posflg
Corr -0.2
CCDM
Ccdm 21112+7404 RComp Comp B Note1
Note2 Discov num STF2784 DRAs -3.59 DDEs -16.0
R dRAs 90 Year 1833 Theta 347 Rho 14.2
Obs 6 Vmag 11.1 Sp PmNote
PmRA 15 PmDE 5 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14762 M ADS BDS N IDS IDS 21112N7339B
HIC