21125+2821 HO 152 (HD 202015)
21h 12m 31.11s +28° 20' 39.1" P.A. 158.00 sep 0.2 mag 8.87,9.39 Sp F8 dist. 129.7 pc (423.08 l.y.)
Coord 2000 |
21125+2821 |
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Discov num |
HO 152 |
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Comp |
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Coord arcsec 2000 |
21 12 31.11 +28 20 39.1 |
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Date first |
1882 |
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Date last |
2016 |
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Obs |
73 |
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Pa first |
320 |
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Pa last |
158.4 |
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P.A. Now (θ) |
227.2° |
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Sep first |
0.5 |
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Sep last |
0.167 |
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Sep. Now (ρ) |
0.071" |
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Mag pri |
8.87 |
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Mag sec |
9.39 |
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delta mag (ΔM) |
0.52 |
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Spectral class |
F8 (yellow-white) |
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Pri motion ra |
+034 |
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Sec motion ra |
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Pri motion dec |
-017 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 202015 |
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Constellation |
Vulpecula |
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SAO |
89529 |
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HIP |
104701 |
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Tycho2 |
2185-01934-1 |
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Gaia DR2 |
1851191656893178240 |
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HD |
202015 |
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ADS |
14748 |
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BD |
BD+27 4003 |
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Distance |
129.7 |
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Distance ly |
423.08 |
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ORBITAL ELEMENTS
Period (P) | 202y | ± 15 |
Periastron (T) | 2014.66y | ± 0.6 |
Semi-major axis (a) | 0.377a | ± 0.01 |
Eccentricity (e) | 0.504 | ± 0.025 |
Inclination (i) | 70.3° | ± 1.5 |
Longitude of periastron (ω) | 44° | ± 5 |
Node (Ω) | 131° | ± 1.5 |
Notes | | |
Reference | Doc2021e | |
Equinox | | |
Last observation | 2016 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
119.7 |
0.218 |
2001 |
121.2 |
0.218 |
2002 |
122.8 |
0.219 |
2003 |
124.3 |
0.218 |
2004 |
125.9 |
0.217 |
2005 |
127.5 |
0.214 |
2006 |
129.1 |
0.211 |
2007 |
130.8 |
0.207 |
2008 |
132.5 |
0.202 |
2009 |
134.4 |
0.196 |
2010 |
136.4 |
0.188 |
2011 |
138.6 |
0.180 |
2012 |
141.0 |
0.171 |
2013 |
143.6 |
0.160 |
2014 |
146.7 |
0.149 |
2015 |
150.3 |
0.137 |
2016 |
154.6 |
0.125 |
2017 |
159.8 |
0.113 |
2018 |
166.4 |
0.101 |
2019 |
174.6 |
0.089 |
2020 |
185.0 |
0.080 |
2021 |
197.7 |
0.073 |
2022 |
212.3 |
0.070 |
2023 |
227.2 |
0.071 |
2024 |
240.8 |
0.077 |
2025 |
252.1 |
0.085 |
2026 |
261.1 |
0.096 |
2027 |
268.2 |
0.109 |
2028 |
273.7 |
0.122 |
2029 |
278.2 |
0.136 |
2030 |
281.8 |
0.150 |
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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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