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 |
|
Discov num |
HO 152 |
|
Comp |
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Coord arcsec 2000 |
21 12 31.11 +28 20 39.1 |
|
| Date first |
1882 |
|
Date last |
2016 |
|
Obs |
73 |
|
| Pa first |
320 |
|
Pa last |
158.4 |
|
P.A. Now (θ) |
227.2° |
|
| Sep first |
0.5 |
|
Sep last |
0.167 |
|
Sep. Now (ρ) |
0.071" |
|
| Mag pri |
8.87 |
|
Mag sec |
9.39 |
|
delta mag (ΔM) |
0.52 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
+034 |
|
Sec motion ra |
|
|
| 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 |
|
Constellation |
Vulpecula |
|
SAO |
89529 |
|
HIP |
104701 |
|
| Tycho2 |
2185-01934-1 |
|
Gaia DR2 |
1851191656893178240 |
|
HD |
202015 |
|
ADS |
14748 |
|
| BD |
BD+27 4003 |
|
Distance |
129.7 |
|
Distance ly |
423.08 |
|
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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