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Current system
21251+0923
STF 2793 AB,C
HD 203943


Nearby doubles
42' : 21245+1003
SKF 16

45' : 21226+0900
CVR 895

50' : 21224+0953
J 1356

60' : 21281+1002
GWP3062

68' : 21221+0832
UC 4460

68' : 21225+0827
HU 275

69' : 21286+0838
GWP3065

71' : 21236+1030
BRT1356

78' : 21201+0947
UC 4444AB

80' : 21214+1020
A 617

81' : 21197+0931
STF2786

88' : 21202+1018
HJ 933

98' : 21298+1031
UC 4476

100' : 21187+0857
LDS4877

102' : 21319+0908
CVR 906

102' : 21225+1057
J 161

103' : 21309+0828
J 199

104' : 21244+0740
TDT2946

104' : 21227+1101
BPM2367

105' : 21181+0942
HJ 3020

106' : 21180+0934
HJ 3021

107' : 21322+0941
KPP 926

108' : 21181+0854
UC 4436

111' : 21179+0952
HJ 3019

114' : 21287+0743
HU 276

114' : 21290+1100
GRV 470



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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21251+0923 STF 2793 AB,C (HD 203943)

 
 
21h 25m 05.66s +09° 23' 02.6" P.A. 241.00 sep 26.4 mag 7.44,8.98 Sp A5IV-V dist. 86.73 pc (282.91 l.y.)
 
 
Coord 2000 21251+0923 Discov num STF2793 Comp AB,C Coord arcsec 2000 21 25 05.66 +09 23 02.6
Date first 1828 Date last 2014 Obs 59
Pa first 242 Pa last 241.4 P.A. Now (θ) 241.4°
Sep first 26.5 Sep last 26.4 Sep. Now (ρ) 26.4"
Mag pri 7.44 Mag sec 8.98 delta mag (ΔM) 1.54 Spectral class A5IV-V (white)
Pri motion ra +022 Sec motion ra +024
Pri motion dec +005 Sec motion dec +006
Notes N V (See Notes, Proper motion indicates physical)
rPM=0.09 (< 0.3, Physical double)
This double is physical.
 
 
21251+0923 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 126783 21 25 06 +09 23 03 BU 164 AB 2021 72 93 0.1 8.17 8.30 0.13 Y
Show HD 203943 126783 21 25 06 +09 23 03 STF 2793 AB,C 2014 59 241 26.4 7.44 8.98 1.54 <===
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 203943 Constellation Equuleus SAO 126783 HIP 105743
Tycho2 1110-02259-1 Gaia DR2 1742076603985458304 HD 203943 BD BD+08 4670
Distance 86.73 Distance ly 282.91
 
 
WDS 21251+0923 STF 2793 AB,C (HD 203943) : NOTES
 
 
discov_num notes refcode
STF2793 AB,C: According to Le Beau, this pair is physical. LBu1990c
 
 
REFERENCES
 
 
refcode metd author reference
LBu1990c Ma - Le Beau, J. 1990O&T....22...39L
LBu1990c Obs. et Travaux 22, 39, 1990
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21251+0923 STF2793 AB,C 2008 52 242 26.7 7.44 8.98 A5IV-V N D 212505.66+092302.6
21251+0923 STF2793 AB,C 2013 55 242 27.0 7.44 8.98 A5IV-V N D 212505.66+092302.6
21251+0923 STF2793 AB,C 2014 56 241 26.4 7.44 8.98 A5IV-V NVD 212505.66+092302.6

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

 
 
WDS 21251+0923 STF 2793 AB,C (HD 203943) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21251+0923 STF 2793 AB,C (HD 203943) : MEASURES
 
 
No records found.

 
 
WDS 21251+0923 (HD 203943) : VIRTUAL EYEPIECE
 
 

21251+0923 BU 164A mag 8.17 Sp A5IV 21251+0923 BU 164B sep 0.1 P.A. 93.40 mag 8.3 Sp V 21251+0923 STF2793C sep 26.1 P.A. 241.10 mag 8.98 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 21251+0923 (HD 203943) : ALADIN DSS IMAGE @ 21h 25m 05.66s +09° 23' 02.6"
 
 
 
 
WDS 21251+0923 STF 2793 AB,C (HD 203943) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21251+0923 STF2793AB,C distance=0' 21245+1003 SKF 16 distance=42' 21226+0900 CVR 895 distance=45' 21224+0953 J 1356 distance=50' 21281+1002 GWP3062 distance=60' 21221+0832 UC 4460 distance=68' 21225+0827 HU 275 distance=68' 21286+0838 GWP3065 distance=69' 21236+1030 BRT1356 distance=71' 21201+0947 UC 4444AB distance=78' 21214+1020 A 617 distance=80' 21197+0931 STF2786 distance=81' 21202+1018 HJ 933 distance=88' 21298+1031 UC 4476 distance=98' 21187+0857 LDS4877 distance=100' 21319+0908 CVR 906 distance=102' 21225+1057 J 161 distance=102' 21309+0828 J 199 distance=103' 21244+0740 TDT2946 distance=104' 21227+1101 BPM2367 distance=104' 21181+0942 HJ 3020 distance=105' 21180+0934 HJ 3021 distance=106' 21322+0941 KPP 926 distance=107' 21181+0854 UC 4436 distance=108' 21179+0952 HJ 3019 distance=111' 21287+0743 HU 276 distance=114' 21290+1100 GRV 470 distance=114' 21224+1110 NSN 743 distance=115' 21272+0732 UC 4471 distance=115' 21316+0823 LDS4893 distance=115' 21223+1111 BRT1355 distance=115' 21291+0744 GWP3066 distance=116' 21289+1105 STF2799AB distance=117' 21289+1105 STF2799AC distance=117' 21254+1121 A 887AB distance=118' 21254+1121 A 887AC distance=118' 21254+1121 FYM 330AD distance=118' 21254+1121 FYM 330AE distance=118' 21222+1114 J 2605 distance=118' 21277+0729 TDT2978 distance=121' 21181+1027 UC 4435 distance=122' 21178+0817 KPP 490 distance=127' 21165+0924 LAF 64AB distance=127' 21165+0924 LAF 64AC distance=127' 21328+0829 GWP3072 distance=127' 21165+0936 BRT3228 distance=128' 21271+0716 UC 4470 distance=131' 21215+1122 BPM2363 distance=131' 21198+1108 GRV 446 distance=131' 21248+1136 GWP3057 distance=134' 21161+0851 CVR 891 distance=137' 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 21251+0923 BU 164 AB 93 0.1
Show 21251+0923 STF2793 AB,C 241 26.4
Show 21245+1003 SKF 16 60 53.2 42
Show 21226+0900 CVR 895 47 17.8 45
Show 21224+0953 J 1356 176 8.0 50
Show 21281+1002 GWP3062 27 72.0 60
Show 21221+0832 UC 4460 236 22.0 68
Show 21225+0827 HU 275 56 0.4 68
Show 21286+0838 GWP3065 135 13.0 69
Show 21236+1030 BRT1356 63 5.7 71
Show 21201+0947 UC 4444 AB 170 74.7 78
Show 21214+1020 A 617 45 0.0 80
Show 21197+0931 STF2786 188 2.8 81
Show 21202+1018 HJ 933 239 17.0 88
Show 21298+1031 UC 4476 231 10.3 98
Show 21187+0857 LDS4877 123 89.5 100
Show 21319+0908 CVR 906 347 30.1 102
Show 21225+1057 J 161 300 2.0 102
Show 21309+0828 J 199 187 4.9 103
Show 21244+0740 TDT2946 54 0.4 104
Show 21227+1101 BPM2367 336 97.0 104
Show 21181+0942 HJ 3020 295 25.8 105
Show 21180+0934 HJ 3021 237 23.8 106
Show 21322+0941 KPP 926 54 7.6 107
Show 21181+0854 UC 4436 34 37.6 108
Show 21179+0952 HJ 3019 309 15.0 111
Show 21287+0743 HU 276 29 0.9 114
Show 21290+1100 GRV 470 317 54.1 114
Show 21224+1110 NSN 743 262 2.3 115
Show 21272+0732 UC 4471 327 11.8 115
Show 21316+0823 LDS4893 276 7.6 115
Show 21223+1111 BRT1355 192 4.1 115
Show 21291+0744 GWP3066 106 11.9 116
Show 21289+1105 STF2799 AB 259 1.9 117
Show 21289+1105 STF2799 AC 331 135.9 117
Show 21254+1121 A 887 AB 213 0.1 118
Show 21254+1121 A 887 AC 322 12.3 118
Show 21254+1121 FYM 330 AD 79 22.9 118
Show 21254+1121 FYM 330 AE 61 16.2 118
Show 21222+1114 J 2605 223 1.5 118
Show 21277+0729 TDT2978 88 0.4 121
Show 21181+1027 UC 4435 259 50.5 122
Show 21178+0817 KPP 490 319 5.0 127
Show 21165+0924 LAF 64 AB 29 5.5 127
Show 21165+0924 LAF 64 AC 168 12.4 127
Show 21328+0829 GWP3072 207 39.2 127
Show 21165+0936 BRT3228 259 6.2 128
Show 21271+0716 UC 4470 241 48.2 131
Show 21215+1122 BPM2363 196 52.2 131
Show 21198+1108 GRV 446 157 60.2 131
Show 21248+1136 GWP3057 181 11.2 134

 
 
WDS 21251+0923 : COMPONENTS
 
 
  A B
B pa=93.4°
sep=0.13"
 
C pa=241.1°
sep=26.13"
pa=241.2°
sep=26.23"
 
 
21251+0923 A
 
 
Coord arcsec 2000 212505.66+092302.6 Mag 8.17 Spectral class A5IV (white) PmRA 23.00
PmDE 6.0 SAO 126783 HIP 105747 Tycho2 1110-02259-1
HD 203943 GC 29991 BD BD+08 4671
Tycho2
Tycho2 1110-02259-1 Pflag RAmdeg 321.27366063 DEmdeg 9.38407043
PmRA 23.4 PmDE 5.8 E RAmdeg 4 E DEmdeg 5
E pmRA 1.5 E pmDE 1.4 EpRAm 1991.55 EpDEm 1991.23
Num 12 Q RAmdeg 1.0 Q DEmdeg 0.8 Q pmRA 1.0
Q pmDE 0.8 BTmag 7.633 E BTmag 0.015 VTmag 7.442
E VTmag 0.011 Prox 267 TYC T HIP 105747
CCDM AB RAdeg 321.27360611 DEdeg 9.38405667 EpRA 1990 1.74
EpDE 1990 1.53 E RAdeg 4.2 E DEdeg 5.1 Posflg P
Corr 0.0
SAO
SAO 126783 DelFlag RA1950 PmRA1950 0.0016
DE1950 PmDE1950 0.017 Vmag 7.7 SpType A2
Double code Source 70 CatNum 29991 DM BD+08 4671
DMcomp BDsup HD 203943 M HD 9
GC 29991 RA1950rad 5.59659326 DE1950rad 0.1600091 PmRA2000 0.0017
PmDE2000 0.013
Hipparcos
Catalog H HIP 105747 Proxy H RAhms 21 25 05.66
DEdms +09 23 02.6 Vmag 7.43 VarFlag R Vmag H
RAdeg 321.274 DEdeg 9.38405 AstroRef * Plx 6.53
CCDM 21251+0923 N CCDM I Nsys 2 Ncomp 2
MultFlag C Source P Qual B M HIP AB
Theta 201 Rho 0.14 HD 203943 BD BD+08 4671
CD CP Dm number +08 4671 VIred 0.14
SpType A2 R SpType Coord arcsec 2000 212505.66+092302.6
Hipparcos 2
HIP 105747 Sn 55 So 3 Nc 2
RArad 5.6072822326 DErad 0.1637828105 Plx 7.35 PmRA 21.55
PmDE 4.45 E RArad 2.65 E DErad 2.47 E Plx 2.91
E pmRA 3.12 E pmDE 2.47 Hpmag 7.4787 E Hpmag 0.0022
SHp 0.013 VA 0 BV 0 E BV 0.495
VI 0.14
CCDM
Ccdm 21251+0923 RComp Comp A Note1
Note2 Discov num DRAs -0.28 DDEs 2.0
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.2 Sp A2 PmNote *
PmRA 35 PmDE -3 Dm number +08 4671 Cat1 BD
Name2 +09 2985 Cat2 AGK2/3 HD 203944 M HD
ADS BDS A14954 M ADS BDS N IDS IDS 21202N0857A
HIC 105747
 
 
21251+0923 B
 
 
Coord arcsec 2000 212505.67+092302.6 Mag 8.3 Spectral class V Calc delta mag 0.13
Calc coord yes
CCDM
Ccdm 21251+0923 RComp Comp B Note1
Note2 Discov num BU 164 DRAs DDEs
R dRAs Year 1957 Theta 229 Rho 0.4
Obs 23 Vmag 8.7 Sp A2 PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14954 M ADS BDS N IDS IDS 21202N0857B
HIC 105747
 
 
21251+0923 C
 
 
Coord arcsec 2000 212504.11+092250.0 Mag 8.98 Spectral class V PmRA 24.00
PmDE 6.0 HIP 105743 Tycho2 1110-02318-1 BD BD+08 4670
Calc delta mag 0.81 Calc coord yes
Tycho2
Tycho2 1110-02318-1 Pflag RAmdeg 321.26704016 DEmdeg 9.38053920
PmRA 17.9 PmDE 5.8 E RAmdeg 10 E DEmdeg 12
E pmRA 1.4 E pmDE 1.4 EpRAm 1990.63 EpDEm 1989.93
Num 10 Q RAmdeg 1.4 Q DEmdeg 0.8 Q pmRA 1.5
Q pmDE 0.9 BTmag 9.290 E BTmag 0.021 VTmag 8.982
E VTmag 0.018 Prox 267 TYC T HIP 105743
CCDM C RAdeg 321.26699667 DEdeg 9.38052417 EpRA 1990 1.74
EpDE 1990 1.49 E RAdeg 9.8 E DEdeg 11.8 Posflg
Corr 0.1
Hipparcos
Catalog H HIP 105743 Proxy RAhms 21 25 04.09
DEdms +09 22 49.9 Vmag 9.29 VarFlag R Vmag H
RAdeg 321.267 DEdeg 9.38053 AstroRef C Plx 6.53
CCDM 21251+0923 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source F Qual B M HIP
Theta Rho HD BD BD+08 4670
CD CP Dm number +08 4670 VIred 0.42
SpType F0 R SpType Coord arcsec 2000 212504.09+092249.9
Hipparcos 2
HIP 105743 Sn 15 So 3 Nc 1
RArad 5.6071677529 DErad 0.1637211731 Plx 11.53 PmRA 34.55
PmDE 10.63 E RArad 5.26 E DErad 4 E Plx 5.93
E pmRA 6.52 E pmDE 4.26 Hpmag 9.376 E Hpmag 0.0261
SHp 0.212 VA 0 BV 0.361 E BV 0.072
VI 0.42
CCDM
Ccdm 21251+0923 RComp Comp C Note1
Note2 Discov num STF2793 DRAs -1.89 DDEs -10.6
R dRAs 10 Year 1828 Theta 242 Rho 26.6
Obs 16 Vmag 8.9 Sp PmNote *
PmRA 26 PmDE 2 Dm number +08 4670 Cat1 BD
Name2 +09 2984 Cat2 AGK2/3 HD 203944 M HD
ADS BDS A14954 M ADS BDS N IDS IDS 21202N0857C
HIC 105743