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 |
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Comp |
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Coord arcsec 2000 |
21 15 49.40 +05 14 53.1 |
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| Date first |
1989 |
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Date last |
2016 |
|
Obs |
41 |
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| 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) |
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| Pri motion ra |
+059 |
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Sec motion ra |
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| Pri motion dec |
-088 |
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Sec motion dec |
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| Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
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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 |
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| GC |
29735 |
|
BD |
BD+04 4635 |
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Bayer |
Alpha Equulei |
|
Bayer name |
Alp Equ |
|
| Flamsteed |
8 Equulei |
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Flamsteed name |
8 Equ |
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FK5 |
800 |
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Distance |
58.34 |
|
| Distance ly |
190.31 |
|
Bayer greek |
α Equ |
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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 |
Notes | n | |
Reference | HJL2020 | |
| Equinox | | |
Last observation | | |
Grade | 1 | (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 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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