21274-0701 HDS 3053 (HD 204236)
21h 27m 23.25s -07° 00' 56.1" P.A. 85.00 sep 0.1 mag 7.97,9.14 Sp F8+G8 dist. 57.21 pc (186.62 l.y.)
| Coord 2000 |
21274-0701 |
|
Discov num |
HDS3053 |
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Comp |
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Coord arcsec 2000 |
21 27 23.25 -07 00 56.1 |
|
| Date first |
1991 |
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Date last |
2021 |
|
Obs |
48 |
|
| Pa first |
172 |
|
Pa last |
85.3 |
|
P.A. Now (θ) |
106.1° |
|
| Sep first |
0.1 |
|
Sep last |
0.129 |
|
Sep. Now (ρ) |
0.156" |
|
| Mag pri |
7.97 |
|
Mag sec |
9.14 |
|
delta mag (ΔM) |
1.17 |
|
Spectral class |
F8+G8 (yellow-white/yellow) |
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| Pri motion ra |
+013 |
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Sec motion ra |
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| Pri motion dec |
-092 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 204236 |
|
Constellation |
Aquarius |
|
SAO |
145409 |
|
HIP |
105947 |
|
| Tycho2 |
5207-00130-1 |
|
Gaia DR2 |
6898265656937739648 |
|
HD |
204236 |
|
BD |
BD-07 5565 |
|
| Distance |
57.21 |
|
Distance ly |
186.62 |
|
ORBITAL ELEMENTS
| Period (P) | 20.63y | ± 0.04 |
Periastron (T) | 1995.14y | ± 0.05 |
Semi-major axis (a) | 164.2m | ± 0.5 |
| Eccentricity (e) | 0.357 | ± 0.002 |
Inclination (i) | 50.4° | ± 0.3 |
Longitude of periastron (ω) | 149.2° | ± 0.8 |
| Node (Ω) | 153.2° | ± 0.5 |
Notes | n | |
Reference | Mit2021 | |
| Equinox | | |
Last observation | 2020 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
68.2 |
0.114 |
| 2001 |
87.2 |
0.130 |
| 2002 |
101.7 |
0.149 |
| 2003 |
112.8 |
0.168 |
| 2004 |
121.8 |
0.186 |
| 2005 |
129.3 |
0.200 |
| 2006 |
136.0 |
0.209 |
| 2007 |
142.2 |
0.214 |
| 2008 |
148.3 |
0.212 |
| 2009 |
154.8 |
0.204 |
| 2010 |
162.0 |
0.189 |
| 2011 |
170.8 |
0.167 |
| 2012 |
182.9 |
0.137 |
| 2013 |
202.5 |
0.104 |
| 2014 |
237.8 |
0.079 |
| 2015 |
284.9 |
0.081 |
| 2016 |
318.9 |
0.102 |
| 2017 |
342.9 |
0.112 |
| 2018 |
5.2 |
0.111 |
| 2019 |
29.1 |
0.106 |
| 2020 |
53.8 |
0.108 |
| 2021 |
75.8 |
0.119 |
| 2022 |
93.0 |
0.137 |
| 2023 |
106.1 |
0.156 |
| 2024 |
116.3 |
0.175 |
| 2025 |
124.7 |
0.191 |
| 2026 |
131.8 |
0.204 |
| 2027 |
138.3 |
0.212 |
| 2028 |
144.5 |
0.214 |
| 2029 |
150.7 |
0.210 |
| 2030 |
157.3 |
0.199 |
|
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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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