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Doubles in session


Current system
21158+0515
WRH 35
Kitalpha


Nearby doubles
33' : 21140+0457
GWP3048

38' : 21149+0440
BAL2979

39' : 21184+0518
HDS3031

39' : 21145+0441
BU 682AB

43' : 21172+0438
HU 274

44' : 21138+0545
KPP3367

54' : 21164+0421
GRV 442

56' : 21139+0427
BAL2977

57' : 21156+0419
TDT2865

59' : 21131+0558
GWP3043AB

62' : 21126+0437
HJ 3013

63' : 21197+0537
J 2341

65' : 21190+0559
HJ 3022AB

76' : 21179+0407
BAL2559

83' : 21147+0354
UC 4420

88' : 21217+0512
CBL 599

89' : 21169+0347
UC 4426

98' : 21094+0502
STT 429

100' : 21096+0550
TDT2793

102' : 21126+0644
KPP 6

108' : 21192+0339
J 1721

111' : 21091+0429
J 848

111' : 21129+0333
UC 4407

111' : 21109+0352
HO 151

111' : 21143+0705
HJ 3015

113' : 21124+0656
BRT2190



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.

21158+0515 WRH 35 (Kitalpha)

 
 
21h 15m 49.40s +05° 14' 53.1" P.A. 104.00 sep 0.0 mag 2.60,4.70 Sp G0III+A5V dist. 58.34 pc (190.31 l.y.)
 
 
Coord 2000 21158+0515 Discov num WRH  35 Comp Coord arcsec 2000 21 15 49.40 +05 14 53.1
Date first 1989 Date last 2016 Obs 41
Pa first 127 Pa last 103.5 P.A. Now (θ) 103.5°
Sep first 0.0 Sep last 0.011 Sep. Now (ρ) 0.011"
Mag pri 2.60 Mag sec 4.70 delta mag (ΔM) 2.1 Spectral class G0III+A5V (yellow/white)
Pri motion ra +059 Sec motion ra
Pri motion dec -088 Sec motion dec
Notes N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Kitalpha Constellation Equuleus SAO 126662 HIP 104987
Tycho2 0536-02354-1 Gaia DR2 1732693474833048192 HD 202447 HR 8131
GC 29735 BD BD+04 4635 Bayer Alpha Equulei Bayer name Alp Equ
Flamsteed 8 Equulei Flamsteed name 8 Equ FK5 800 Distance 58.34
Distance ly 190.31 Bayer greek α Equ
 
 
ORBITAL ELEMENTS
 
 
Period (P)98.8045d± 0.00035 Periastron (T)57277.7d (2015.697y)± 1.7 Semi-major axis (a)12.105m± 0.013
Eccentricity (e)0.00417± 0.00076 Inclination (i)151.52°± 0.28 Longitude of periastron (ω)282.9°± 6.3
Node (Ω)216.57°± 0.16 Notesn ReferenceHJL2020
Equinox Last observation Grade1(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 302.5 0.011
2001-01-01 50.7 0.012
2002-01-01 164.6 0.011
2003-01-01 266.8 0.011
2004-01-01 22.2 0.012
2005-01-01 129.2 0.011
2006-01-01 235.5 0.012
2007-01-01 351.5 0.011
2008-01-01 93.6 0.011
2009-01-01 206.8 0.012
2010-01-01 316.5 0.011
2011-01-01 61.8 0.012
2012-01-01 176.8 0.011
2013-01-01 279.8 0.011
2014-01-01 33.0 0.012
2015-01-01 142.9 0.011
2016-01-01 246.8 0.012
2017-01-01 3.6 0.012
2018-01-01 106.7 0.011
2019-01-01 217.5 0.012
2020-01-01 330.2 0.011
2021-01-01 73.2 0.012
2022-01-01 188.5 0.012
2023-01-01 293.4 0.011
2024-01-01 43.7 0.012
2025-01-01 156.2 0.011
2026-01-01 258.7 0.011
2027-01-01 15.0 0.012
2028-01-01 120.2 0.011
2029-01-01 228.3 0.012
2030-01-01 343.3 0.011


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


 
  


wds21158%2B0515c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21158+0515 WRH 35 (Kitalpha) : NOTES
 
 
discov_num notes refcode
WRH 35 alp Equ = 8 Equ = Kitalpha
A measure on 1980.4853 was incorrectly attributed to HR 8131 in
McAlister et al. (1983); it actually belongs to ADS 14893. McA1983
The equinox-1900 coordinates of this star are incorrectly given as
21158+0430 in the first speckle catalogue. McA1984b
P = 98.800 d, adopted from Rosvick & Scarfe (1991); T = 2447592.1 for Scf1991b
combined spectroscopic/astrometric orbit by Armstrong et al. (1992). MkT1992b
Quoted errors in T and omega are +3.6/-10.1d and +14/-37deg,
respectively. Errors to Mark III astrometry are given as "error
ellipses" ; these values are tabulated below, together with filters
used. Columns include date (BY), major and minor axes of the ellipse
(mas), ellipse orientation (deg), filter effective wavelength (nm):
1989.4493 1.94 0.081 90.9 800,550,450
1989.4628 0.45 0.049 104.5 800,550,450
1989.4712 1.23 0.095 90.8 800,550,450
1989.4766 3.19 0.16 94.7 800,550,450
1989.5177 3.84 0.57 80.6 800,550,450
1989.5313 3.69 2.24 114.8 800,550,450
1989.6021 2.51 0.48 106.5 800,550,450
1989.6050 1.39 0.36 88.9 800,550,450
1989.6159 0.99 0.18 88.6 800,550
1989.6349 0.45 0.22 78.1 800,550
1989.6430 1.13 0.22 108.2 800,550,450
1989.6540 2.86 0.10 99.4 800,550
1989.7060 2.06 0.24 85.5 800,550,450
1989.7854 4.10 1.65 74.4 800,550,450
1989.7934 3.04 0.63 75.4 800,550,450
1989.7961 1.39 0.38 77.9 800,550,450
1989.8373 0.94 0.091 69.9 800,550
1989.8482 0.73 0.085 76.1 800,550,450
1990.4840 1.35 0.22 103.7 800,550,500
1990.4896 4.72 0.74 93.2 800,550,500
1990.5743 0.15 0.042 86.4 800,550,500
1990.5770 0.33 0.080 88.8 800,550,500
1990.5824 0.26 0.059 94.9 800,550,500
1990.6536 0.19 0.041 82.4 800,550,500
1990.6616 0.41 0.079 86.3 800,550,500
1990.6644 0.29 0.054 85.8 800,550,500
1990.6698 0.20 0.050 96.2 800,550,500
1990.6727 0.66 0.086 81.4 800,550,500
1990.7054 0.34 0.081 81.4 800,550,500
Pourbaix gives combined solution for this resolved SB2, yielding Pbx2000b
orbital parallaxes and component masses.
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 4.68 +/- 0.20, 5.08, and 3.52 Msun, respectively. Mlk2012
Mass = 2.20 +/- 0.16 , 1.883 +/- 0.083 \msun for A and B. HJL2020
orbital parallax = 18.11 +/- 0.24 mas.
 
 
REFERENCES
 
 
refcode metd author reference
HJL2020 Kv+ j Halbwachs, J.-L., Kiefer, F., Lebreton, Y., Boffin, H.M.J., Arenou, F., LeBouquin, 2020MNRAS.496.1355H
HJL2020 +orb J.-B., Famaey, B., Dourbaix, D., Guillout, P., Salomon, J.-B. & Mazeh, T.
HJL2020 MNRAS 496, 1355, 2020
McA1983 Sc j McAlister, H.A., Hendry, E.M., Hartkopf, W.I., Campbell, B.G., & Fekel, F.C. 1983ApJS...51..309M
McA1983 ApJS 51, 309, 1983
McA1984b Sc j McAlister, H.A. & Hartkopf, W.I. ...................
McA1984b Catalog of Interferometric Measurements of Binary Stars, CHARA Contrib. #1, 1984
McA1984b (previously unpublished KPNO 2.1m and 3.8m data)
MkT1992b Km j Armstrong, J.T., Mozurkewich, D., Vivekanand, M., Simon, R.S., Denison, C.S., 1992AJ....104..241A
MkT1992b +orb Johnston, K.J., Pan, X.-P., Shao, M., et al.
MkT1992b AJ 104, 241, 1992
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Pbx2000b orb - Pourbaix, D. 2000A&AS..145..215P
Pbx2000b A&AS 145, 215, 2000
Scf1991b - Rosvick, J.M. & Scarfe, C.D. 1991MNRAS.252...68R
Scf1991b MNRAS 252, 68, 1991
 
 
DISCOVERER
 
 
idgroup discov author
1 WRH Wilson, R.H.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21158+0515 WRH 35 1990 30 250 0.0 3.92   G0III+A5V NO 211549.40+051453.1
21158+0515 WRH 35 2016 41 104 0.0 2.60 4.70 G0III+A5V NO K 211549.40+051453.1

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

 
 
WDS 21158+0515 WRH 35 (Kitalpha) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21158+0515 WRH 35 (Kitalpha) : MEASURES
 
 
No records found.

 
 
WDS 21158+0515 (Kitalpha) : VIRTUAL EYEPIECE
 
 

21158+0515 WRH 35A mag 2.6 Sp G0III 21158+0515 WRH 35B mag 4.7 Sp A5V 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 21158+0515 (Kitalpha) : ALADIN DSS IMAGE @ 21h 15m 49.40s +05° 14' 53.1"
 
 
 
 
WDS 21158+0515 WRH 35 (Kitalpha) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21158+0515 WRH 35 (Kitalpha) distance=0' 21140+0457 GWP3048 distance=33' 21149+0440 BAL2979 distance=38' 21184+0518 HDS3031 distance=39' 21145+0441 BU 682AB distance=39' 21145+0441 BU 682AC distance=39' 21172+0438 HU 274 distance=43' 21138+0545 KPP3367 distance=44' 21164+0421 GRV 442 distance=54' 21139+0427 BAL2977 distance=56' 21156+0419 TDT2865 distance=57' 21131+0558 GWP3043AB distance=59' 21131+0558 GWP3044AC distance=59' 21126+0437 HJ 3013 distance=62' 21197+0537 J 2341 distance=63' 21190+0559 HJ 3022AB distance=65' 21190+0559 HJ 3022AC distance=65' 21179+0407 BAL2559 distance=76' 21147+0354 UC 4420 distance=83' 21217+0512 CBL 599 distance=88' 21169+0347 UC 4426 distance=89' 21094+0502 STT 429 distance=98' 21096+0550 TDT2793 distance=100' 21126+0644 KPP 6 distance=102' 21192+0339 J 1721 distance=108' 21091+0429 J 848 distance=111' 21129+0333 UC 4407 distance=111' 21109+0352 HO 151 distance=111' 21143+0705 HJ 3015 distance=111' 21124+0656 BRT2190 distance=113' 21173+0323 BAL2050 distance=114' 21093+0618 TDT2789 distance=116' 21080+0509 STT 527 distance=117' 21093+0410 BU 1330AB distance=118' 21151+0712 UC 4422 distance=118' 21080+0539 HJ 3011AB distance=120' 21080+0539 BU 9018AC distance=120' 21080+0539 BU 9018CD distance=122' 21225+0403 UC 4462 distance=123' 21090+0410 HJ 5515AB distance=124' 21090+0410 HJ 5515AC distance=124' 21135+0713 BU 270AB distance=124' 21135+0713 S 781AB,D distance=124' 21135+0713 BU 270AB,C distance=124' 21139+0715 UC 4413 distance=124' 21133+0714 UC 4410 distance=125' 21211+0336 NSN 5 distance=127' 21101+0341 BAL2558 distance=127' 21232+0409 SKF2742 distance=128' 21119+0710 BRT2189 distance=129' 21237+0422 STF2791 distance=130' 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 Kitalpha 21158+0515 WRH 35 104 0.0
Show 21140+0457 GWP3048 278 115.4 33
Show 21149+0440 BAL2979 182 11.5 38
Show 21184+0518 HDS3031 103 0.1 39
Show 21145+0441 BU 682 AB 102 5.7 39
Show 21145+0441 BU 682 AC 179 93.0 39
Show 21172+0438 HU 274 147 4.1 43
Show 21138+0545 KPP3367 245 1.8 44
Show 21164+0421 GRV 442 181 52.9 54
Show 21139+0427 BAL2977 305 17.1 56
Show 21156+0419 TDT2865 112 2.1 57
Show 21131+0558 GWP3043 AB 300 81.7 59
Show 21131+0558 GWP3044 AC 139 96.7 59
Show 21126+0437 HJ 3013 119 11.3 62
Show 21197+0537 J 2341 350 7.4 63
Show 21190+0559 HJ 3022 AB 76 17.3 65
Show 21190+0559 HJ 3022 AC 310 41.8 65
Show 21179+0407 BAL2559 283 3.9 76
Show 21147+0354 UC 4420 80 51.3 83
Show 21217+0512 CBL 599 197 19.9 88
Show 21169+0347 UC 4426 251 27.3 89
Show 21094+0502 STT 429 -1 -1.0 98
Show 21096+0550 TDT2793 354 0.5 100
Show 21126+0644 KPP 6 61 6.7 102
Show 21192+0339 J 1721 272 3.2 108
Show 21091+0429 J 848 141 2.8 111
Show 21129+0333 UC 4407 306 58.2 111
Show 21109+0352 HO 151 17 1.6 111
Show 21143+0705 HJ 3015 264 16.3 111
Show 21124+0656 BRT2190 15 3.7 113
Show 21173+0323 BAL2050 181 18.3 114
Show 21093+0618 TDT2789 20 2.0 116
Show 21080+0509 STT 527 114 0.4 117
Show 21093+0410 BU 1330 AB 54 3.7 118
Show 21151+0712 UC 4422 43 16.1 118
Show 21080+0539 HJ 3011 AB 273 10.6 120
Show 21080+0539 BU 9018 AC 252 139.3 120
Show 21080+0539 BU 9018 CD 340 6.0 122
Show 21225+0403 UC 4462 71 29.2 123
Show 21090+0410 HJ 5515 AB 126 14.4 124
Show 21090+0410 HJ 5515 AC 68 47.8 124
Show 21135+0713 BU 270 AB 342 0.4 124
Show 21135+0713 S 781 AB,D 172 184.1 124
Show 21135+0713 BU 270 AB,C 26 30.8 124
Show 21139+0715 UC 4413 227 26.9 124
Show 21133+0714 UC 4410 319 95.7 125
Show 21211+0336 NSN 5 65 7.5 127
Show 21101+0341 BAL2558 38 2.2 127
Show 21232+0409 SKF2742 104 1.4 128
Show 21119+0710 BRT2189 273 6.5 129
Show 21237+0422 STF2791 103 2.9 130

 
 
WDS 21158+0515 : COMPONENTS
 
 
  A
B pa=103.6°
sep=0.01"
 
 
21158+0515 A
 
 
Componente originario normalizzato AB Common name Kitalpha Coord arcsec 2000 211549.40+051453.1 Mag 2.6
Spectral class G0III (yellow) PmRA 59.00 PmDE -88.0 SAO 126662
HIP 104987 HD 202447 HR 8131 GC 29735
BD BD+04 4635 Bayer Alpha Equulei Bayer name Alp Equ Flamsteed 8 Equulei
Flamsteed name 8 Equ FK5 800
SAO
SAO 126662 DelFlag RA1950 PmRA1950 0.0038
DE1950 PmDE1950 -0.084 Vmag 4.1 SpType +++
Double code Source 74 CatNum 800 DM BD+04 4635
DMcomp BDsup HD 202447 M HD 9
GC 29735 RA1950rad 5.55592404 DE1950rad 0.08796629 PmRA2000 0.004
PmDE2000 -0.088
Hipparcos
Catalog H HIP 104987 Proxy RAhms 21 15 49.40
DEdms +05 14 53.1 Vmag 3.92 VarFlag R Vmag H
RAdeg 318.956 DEdeg 5.24807 AstroRef Plx 17.51
CCDM 21158+0515 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 202447 BD BD+04 4635
CD CP Dm number +04 4635 VIred 0.62
SpType G0III+... R SpType Coord arcsec 2000 211549.40+051453.1
Hipparcos 2
HIP 104987 Sn 5 So 0 Nc 1
RArad 5.5668292305 DErad 0.0915961702 Plx 17.14 PmRA 59.88
PmDE -94.09 E RArad 0.16 E DErad 0.16 E Plx 0.21
E pmRA 0.23 E pmDE 0.18 Hpmag 4.0423 E Hpmag 0.0005
SHp 0.006 VA 0 BV 0.549 E BV 0.003
VI 0.62
CCDM
Ccdm 21158+0515 RComp Comp A Note1
Note2 Discov num DRAs 1.44 DDEs -7.8
R dRAs 10 Year Theta Rho
Obs 2 Vmag 4.1 Sp F8 PmNote *
PmRA 56 PmDE -84 Dm number +04 4635 Cat1 BD
Name2 126662 Cat2 SAO HD 202447 M HD
ADS BDS M ADS BDS N IDS IDS 21108N0450A
HIC 104987
 
 
21158+0515 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 211549.40+051453.1 Mag 4.7 Spectral class A5V (white)
Tycho2 0536-02354-1 HD 202448 Calc delta mag 2.1 Calc coord yes
Tycho2
Tycho2 0536-02354-1 Pflag RAmdeg 318.95595026 DEmdeg 5.24786527
PmRA 52.7 PmDE -85.8 E RAmdeg 3 E DEmdeg 4
E pmRA 0.4 E pmDE 0.4 EpRAm 1990.72 EpDEm 1990.03
Num 21 Q RAmdeg 1.7 Q DEmdeg 1.8 Q pmRA 1.8
Q pmDE 1.8 BTmag 4.552 E BTmag 0.014 VTmag 3.993
E VTmag 0.009 Prox 999 TYC T HIP 104987
CCDM RAdeg 318.95582806 DEdeg 5.24806333 EpRA 1990 1.69
EpDE 1990 1.67 E RAdeg 3.4 E DEdeg 3.6 Posflg
Corr 0.0
CCDM
Ccdm 21158+0515 RComp Comp B Note1
Note2 Discov num WRH DRAs DDEs
R dRAs Year 1949 Theta Rho
Obs 2 Vmag Sp A3 PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD 202448 M HD
ADS BDS M ADS BDS N N IDS IDS 21108N0450B
HIC 104987