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Current system
21051+0757
HDS 3004 AB


Nearby doubles
10' : 21046+0750
HJ 3008

14' : 21059+0803
OSO 140

15' : 21045+0746
BU 269

33' : 21068+0737
GRV 419

43' : 21061+0837
A 1217

51' : 21018+0757
CVR 883

53' : 21053+0704
ENG 80AB

59' : 21089+0741
GRV 424

64' : 21022+0711
STF2742

67' : 21092+0728
KPP 485

70' : 21021+0703
WSP 90AB

73' : 21030+0650
GRV 406

80' : 21001+0731
KUI 102

81' : 21010+0704
HEI 821

93' : 21008+0904
UC 4359

94' : 21090+0643
STT 428

95' : 20596+0842
SKF2096

97' : 20593+0838
HDS2991

97' : 21080+0630
SKF2741

101' : 20584+0757
ARY 68

101' : 21024+0625
TDT2708

103' : 20586+0723
J 1715

107' : 21117+0715
UC 4399

107' : 20580+0804
ARY 67

108' : 20583+0831
ARY 87

109' : 21124+0745
J 576



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.

21051+0757 HDS 3004 AB

 
 
21h 05m 07.95s +07° 56' 44.4" P.A. 252.00 sep 0.3 mag 7.98,11.81 Sp G5 dist. 50.35 pc (164.24 l.y.)
 
 
Coord 2000 21051+0757 Discov num HDS3004 Comp AB Coord arcsec 2000 21 05 07.95 +07 56 44.4
Date first 1991 Date last 2021 Obs 22
Pa first 309 Pa last 252 P.A. Now (θ) 252°
Sep first 0.4 Sep last 0.264 Sep. Now (ρ) 0.264"
Mag pri 7.98 Mag sec 11.81 delta mag (ΔM) 3.83 Spectral class G5 (yellow)
Pri motion ra +005 Sec motion ra
Pri motion dec -089 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
21051+0757 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 126530 21 05 08 +07 56 44 HDS 3004 AB 2021 22 252 0.3 7.98 11.81 3.83 Y <===
Show TV Equ 126530 21 05 08 +07 56 44 MET 90 AC 2003 1 354 4.3 6.39 17.59 11.20
Show 126530 21 05 08 +07 56 44 MET 90 AD 2003 1 166 9.8 6.39 18.09 11.70
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name TV Equ Constellation Equuleus SAO 126530 HIP 104075
Tycho2 1104-01779-1 Gaia DR2 1737234316120828800 HD 200746 BD BD+07 4621
Distance 50.35 Distance ly 164.24
 
 
ORBITAL ELEMENTS
 
 
Period (P)80.42y± 163.73 Periastron (T)2016.78y± 1.39 Semi-major axis (a)0.463a± 0.326
Eccentricity (e)0.691± 0.062 Inclination (i)58°± 21.2 Longitude of periastron (ω)48.7°± 63.5
Node (Ω)88.1°± 32.2 Notes ReferenceTok2015c
Equinox2000 Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 341.4 0.318
2001 345.2 0.304
2002 349.3 0.290
2003 353.9 0.277
2004 358.9 0.265
2005 4.4 0.253
2006 10.4 0.243
2007 16.9 0.234
2008 23.8 0.226
2009 31.2 0.220
2010 39.0 0.215
2011 47.2 0.210
2012 55.7 0.205
2013 64.7 0.199
2014 74.4 0.189
2015 85.7 0.171
2016 100.8 0.141
2017 126.4 0.102
2018 173.3 0.084
2019 214.9 0.113
2020 235.0 0.163
2021 245.5 0.214
2022 252.0 0.261
2023 256.7 0.304
2024 260.2 0.342
2025 263.0 0.377
2026 265.4 0.408
2027 267.5 0.436
2028 269.3 0.462
2029 270.9 0.485
2030 272.4 0.506
2031 273.8 0.525
2032 275.1 0.542
2033 276.3 0.557
2034 277.5 0.571
2035 278.6 0.583
2036 279.7 0.594
2037 280.7 0.604
2038 281.7 0.613
2039 282.6 0.620
2040 283.6 0.626
2041 284.5 0.631
2042 285.4 0.636
2043 286.3 0.639
2044 287.2 0.641
2045 288.1 0.643
2046 289.0 0.643
2047 289.9 0.643
2048 290.8 0.642
2049 291.7 0.641
2050 292.6 0.638


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


 
  


wds21051%2B0757a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21051+0757 HDS 3004 AB : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2015c orb+j Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. 2015AJ....150...50T
Tok2015c +St AJ 150, 50, 2015 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
DISCOVERER
 
 
idgroup discov author
1 HDS Hipparcos Double Star (from additional DD list)
81 TOK Tokovinin, A., Cantarutti, R., Tighe, R., Schurter, P., van der Bliek, N.,
81 TOK Martinez, M., & Mondaca, E.
146 TOK Tokovinin, A., Corbett, H., Fors, O., Howard, W., Law, N.M., Moe, M.,
146 TOK Ratzloff, J. & Walter, F.M.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21051+0757 HDS3004 AB 2008 11 30 0.2 8.14 11.97 G5 D 210507.95+075644.4
21051+0757 HDS3004 AB 2014 13 86 0.2 7.98 11.81 G5 O 210507.95+075644.4
21051+0757 HDS3004 AB 2017 15 142 0.1 7.98 11.81 G5 O 210507.95+075644.4
21051+0757 HDS3004 AB 2018 16 195 0.1 7.98 11.81 G5 O 210507.95+075644.4
21051+0757 HDS3004 AB 2019 17 229 0.1 7.98 11.81 G5 O 210507.95+075644.4
21051+0757 HDS3004 AB 2020 18 246 0.2 7.98 11.81 G5 O 210507.95+075644.4
21051+0757 HDS3004 AB 2021 22 252 0.3 7.98 11.81 G5 O 210507.95+075644.4

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

 
 
WDS 21051+0757 HDS 3004 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21051+0757 HDS 3004 AB : MEASURES
 
 
No records found.

 
 
WDS 21051+0757 : VIRTUAL EYEPIECE
 
 

21051+0757 HDS3004A mag 7.98 Sp G5 21051+0757 HDS3004B sep 0.3 P.A. 251.80 mag 11.81 21051+0757 MET 90C sep 4.3 P.A. 354.00 mag 17.59 21051+0757 MET 90D sep 9.8 P.A. 165.90 mag 18.09 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 21051+0757 : ALADIN DSS IMAGE @ 21h 05m 07.95s +07° 56' 44.4"
 
 
 
 
WDS 21051+0757 HDS 3004 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21051+0757 HDS3004AB distance=0' 21046+0750 HJ 3008 distance=10' 21059+0803 OSO 140 distance=14' 21045+0746 BU 269 distance=15' 21068+0737 GRV 419 distance=33' 21061+0837 A 1217 distance=43' 21018+0757 CVR 883 distance=51' 21053+0704 ENG 80AB distance=53' 21053+0704 ENG 80AC distance=53' 21089+0741 GRV 424 distance=59' 21022+0711 STF2742 distance=64' 21092+0728 KPP 485 distance=67' 21021+0703 WSP 90AB distance=70' 21021+0703 WSP 90AC distance=70' 21021+0703 WSP 90AD distance=70' 21030+0650 GRV 406 distance=73' 21001+0731 KUI 102 distance=80' 21010+0704 HEI 821 distance=81' 21008+0904 UC 4359 distance=93' 21090+0643 STT 428 distance=94' 20596+0842 SKF2096 distance=95' 20593+0838 HDS2991 distance=97' 21080+0630 SKF2741 distance=97' 20584+0757 ARY 68 distance=101' 21024+0625 TDT2708 distance=101' 20586+0723 J 1715 distance=103' 21117+0715 UC 4399 distance=107' 20580+0804 ARY 67 distance=107' 20583+0831 ARY 87 distance=108' 21124+0745 J 576 distance=109' 21101+0919 GWP3039 distance=110' 20582+0835 TDT2664 distance=111' 21119+0710 BRT2189 distance=112' 21086+0938 J 159 distance=114' 21041+0951 GWP3034 distance=116' 21093+0618 TDT2789 distance=117' 21128+0729 UC 4405 distance=118' 21054+0557 BUP 224 distance=120' 20583+0654 KPP 481 distance=120' 20572+0823 UC 4341 distance=122' 21124+0656 BRT2190 distance=125' 21133+0714 UC 4410 distance=129' 21137+0735 KPP 487 distance=129' 21110+0933 STF2765AB distance=130' 21110+0933 STF2765AC distance=130' 20569+0842 RAO 443 distance=132' 21135+0713 BU 270AB distance=132' 21135+0713 S 781AB,D distance=132' 21135+0713 BU 270AB,C distance=132' 20568+0844 CRB 13 distance=132' 21126+0644 KPP 6 distance=133' 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 21051+0757 HDS3004 AB 252 0.3 0
Show 21051+0757 MET 90 AC 354 4.3 0
Show 21051+0757 MET 90 AD 166 9.8 0
Show 21046+0750 HJ 3008 80 27.0 10
Show 21059+0803 OSO 140 273 18.7 14
Show 21045+0746 BU 269 239 1.2 15
Show 21068+0737 GRV 419 302 38.8 33
Show 21061+0837 A 1217 193 2.0 43
Show 21018+0757 CVR 883 128 28.3 51
Show 21053+0704 ENG 80 AB 240 64.6 53
Show 21053+0704 ENG 80 AC 106 169.4 53
Show 21089+0741 GRV 424 327 12.1 59
Show 21022+0711 STF2742 213 3.0 64
Show 21092+0728 KPP 485 7 5.0 67
Show 21021+0703 WSP 90 AB 185 1.0 70
Show 21021+0703 WSP 90 AC 1 9.5 70
Show 21021+0703 WSP 90 AD 83 16.5 70
Show 21030+0650 GRV 406 287 10.5 73
Show 21001+0731 KUI 102 191 0.2 80
Show 21010+0704 HEI 821 90 2.9 81
Show 21008+0904 UC 4359 85 33.3 93
Show 21090+0643 STT 428 256 24.0 94
Show 20596+0842 SKF2096 109 9.2 95
Show 20593+0838 HDS2991 167 0.1 97
Show 21080+0630 SKF2741 40 1.9 97
Show 20584+0757 ARY 68 339 112.4 101
Show 21024+0625 TDT2708 27 0.8 101
Show 20586+0723 J 1715 125 5.2 103
Show 21117+0715 UC 4399 32 82.7 107
Show 20580+0804 ARY 67 1 152.9 107
Show 20583+0831 ARY 87 215 62.2 108
Show 21124+0745 J 576 236 2.3 109
Show 21101+0919 GWP3039 61 73.1 110
Show 20582+0835 TDT2664 274 0.4 111
Show 21119+0710 BRT2189 273 6.5 112
Show 21086+0938 J 159 246 4.0 114
Show 21041+0951 GWP3034 91 63.0 116
Show 21093+0618 TDT2789 20 2.0 117
Show 21128+0729 UC 4405 272 36.1 118
Show 21054+0557 BUP 224 301 30.4 120
Show 20583+0654 KPP 481 233 3.8 120
Show 20572+0823 UC 4341 344 63.1 122
Show 21124+0656 BRT2190 15 3.7 125
Show 21133+0714 UC 4410 319 95.7 129
Show 21137+0735 KPP 487 211 3.2 129
Show 21110+0933 STF2765 AB 82 2.9 130
Show 21110+0933 STF2765 AC 167 44.2 130
Show 20569+0842 RAO 443 297 0.2 132
Show 21135+0713 BU 270 AB 342 0.4 132
Show 21135+0713 S 781 AB,D 172 184.1 132
Show 21135+0713 BU 270 AB,C 26 30.8 132

 
 
WDS 21051+0757 : COMPONENTS
 
 
  A B C
B pa=251.8°
sep=0.26"
 
C pa=354.0°
sep=4.29"
pa=357.3°
sep=4.36"
 
D pa=165.9°
sep=9.80"
pa=164.4°
sep=9.79"
pa=168.4°
sep=14.07"
 
 
21051+0757 A
 
 
Coord arcsec 2000 210507.95+075644.4 Mag 7.98 Spectral class G5 (yellow) PmRA 5.00
PmDE -89.0 SAO 126530 HIP 104075 Tycho2 1104-01779-1
HD 200746 BD BD+07 4621
Tycho2
Tycho2 1104-01779-1 Pflag RAmdeg 316.28312650 DEmdeg 7.94542698
PmRA 6.4 PmDE -94.2 E RAmdeg 7 E DEmdeg 8
E pmRA 1.4 E pmDE 1.5 EpRAm 1991.02 EpDEm 1991.08
Num 11 Q RAmdeg 1.3 Q DEmdeg 1.0 Q pmRA 1.4
Q pmDE 1.1 BTmag 8.767 E BTmag 0.019 VTmag 8.066
E VTmag 0.014 Prox 999 TYC T HIP 104075
CCDM AB RAdeg 316.28311139 DEdeg 7.94564167 EpRA 1990 1.74
EpDE 1990 1.81 E RAdeg 7.2 E DEdeg 7.9 Posflg P
Corr -0.2
SAO
SAO 126530 DelFlag RA1950 PmRA1950 0.0019
DE1950 PmDE1950 -0.082 Vmag 8.4 SpType G5
Double code Source 32 CatNum 10562 DM BD+07 4621
DMcomp BDsup HD 200746 M HD 0
GC RA1950rad 5.50946341 DE1950rad 0.13520309 PmRA2000 0.0021
PmDE2000 -0.086
Hipparcos
Catalog H HIP 104075 Proxy H RAhms 21 05 07.95
DEdms +07 56 44.4 Vmag 7.97 VarFlag R Vmag H
RAdeg 316.283 DEdeg 7.94566 AstroRef A Plx 22.57
CCDM 21051+0757 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source Qual B M HIP AB
Theta 309 Rho 0.41 HD 200746 BD BD+07 4621
CD CP Dm number +07 4621 VIred 0.7
SpType G5 R SpType Coord arcsec 2000 210507.95+075644.4
Hipparcos 2
HIP 104075 Sn 15 So 3 Nc 2
RArad 5.5201817561 DErad 0.1386778639 Plx 19.86 PmRA 1.09
PmDE -91.22 E RArad 0.69 E DErad 0.69 E Plx 0.93
E pmRA 1.03 E pmDE 0.82 Hpmag 8.1066 E Hpmag 0.0021
SHp 0.018 VA 0 BV 0.654 E BV 0.016
VI 0.72
CCDM
Ccdm 21051+0757 RComp Comp A Note1
Note2 Discov num DRAs 1.95 DDEs -16.4
R dRAs 82 Year Theta Rho
Obs 2 Vmag 8.1 Sp G5 PmNote *
PmRA 5 PmDE -89 Dm number +07 4621 Cat1 BD
Name2 +07 3068 Cat2 AGK2/3 HD 200746 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 104075
 
 
21051+0757 B
 
 
Coord arcsec 2000 210507.93+075644.3 Mag 11.81 Calc delta mag 3.83 Calc coord yes
CCDM
Ccdm 21051+0757 RComp Comp B Note1
Note2 Discov num HDS DRAs 1.92 DDEs -16.2
R dRAs 82 Year 1991 Theta 309 Rho 0.4
Obs 1 Vmag 12.0 Sp PmNote *
PmRA 5 PmDE -89 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 104075
 
 
21051+0757 C
 
 
Coord arcsec 2000 210507.92+075648.7 Mag 17.59 Calc delta mag 9.61 Calc coord yes
 
 
21051+0757 D
 
 
Coord arcsec 2000 210508.11+075634.9 Mag 18.09 Calc delta mag 10.11 Calc coord yes