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Doubles in session


Current system
21251+0923
BU 164 AB


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



Selections
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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.

21251+0923 BU 164 AB

 
 
21h 25m 05.66s +09° 23' 02.6" P.A. 93.00 sep 0.1 mag 8.17,8.30 Sp A5IV-V dist. 136.05 pc (443.8 l.y.)
 
 
Coord 2000 21251+0923 Discov num BU  164 Comp AB Coord arcsec 2000 21 25 05.66 +09 23 02.6
Date first 1873 Date last 2021 Obs 72
Pa first 255 Pa last 93.4 P.A. Now (θ) 93.4°
Sep first 0.7 Sep last 0.127 Sep. Now (ρ) 0.127"
Mag pri 8.17 Mag sec 8.30 delta mag (ΔM) 0.13 Spectral class A5IV-V (white)
Pri motion ra +023 Sec motion ra
Pri motion dec +006 Sec motion dec
Notes N O (See Notes, Orbital solution)
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
 
 
Constellation Equuleus SAO 126783 HIP 105747 Tycho2 1110-02259-1
Gaia DR2 1742076603985458304 HD 203943 GC 29991 ADS 14954
BD BD+08 4671 Distance 136.05 Distance ly 443.8
 
 
ORBITAL ELEMENTS
 
 
Period (P)361.54y Periastron (T)2023.74y Semi-major axis (a)0.555a
Eccentricity (e)0.875 Inclination (i)104.5° Longitude of periastron (ω)47.7°
Node (Ω)79.3° Notesn ReferenceZir2010
Equinox2000 Last observation2008 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 179.3 0.101
2001 175.6 0.097
2002 171.5 0.094
2003 167.1 0.091
2004 162.5 0.088
2005 157.6 0.086
2006 152.6 0.085
2007 147.4 0.084
2008 142.1 0.084
2009 136.8 0.084
2010 131.6 0.085
2011 126.5 0.086
2012 121.6 0.088
2013 116.8 0.090
2014 112.3 0.092
2015 108.0 0.094
2016 103.9 0.096
2017 99.9 0.098
2018 96.1 0.099
2019 92.3 0.099
2020 88.4 0.097
2021 84.2 0.092
2022 79.3 0.082
2023 72.5 0.065
2024 59.1 0.042
2025 11.6 0.021
2026 300.2 0.033
2027 281.1 0.060
2028 274.1 0.087
2029 270.3 0.113
2030 267.9 0.136


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds21251%2B0923a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21251+0923 BU 164 AB : 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
Zir2010 orb - Zirm, H. 2010IAUDS.170....1Z
Zir2010 Inf. Circ. 170, 1, 2010
 
 
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 BU 164 AB 1996 65 190 0.1 8.17 8.30 A5IV-V 212505.66+092302.6
21251+0923 BU 164 AB 2008 66 319 0.1 8.17 8.30 A5IV-V 212505.66+092302.6
21251+0923 BU 164 AB 2015 70 112 0.1 8.17 8.30 A5IV-V NO 212505.66+092302.6
21251+0923 BU 164 AB 2021 72 93 0.1 8.17 8.30 A5IV-V NO 212505.66+092302.6

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

 
 
WDS 21251+0923 BU 164 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21251+0923 BU 164 AB : MEASURES
 
 
No records found.

 
 
WDS 21251+0923 : 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 : ALADIN DSS IMAGE @ 21h 25m 05.66s +09° 23' 02.6"
 
 
 
 
WDS 21251+0923 BU 164 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21251+0923 BU 164AB 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