04302-1747 B 1937 (HD 28637)
04h 30m 14.81s -17° 47' 25.0" P.A. 120.00 sep 0.2 mag 9.50,9.70 Sp G6V
| Coord 2000 |
04302-1747 |
|
Discov num |
B 1937 |
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Comp |
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Coord arcsec 2000 |
04 30 14.81 -17 47 25.0 |
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| Date first |
1932 |
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Date last |
2020 |
|
Obs |
16 |
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| Pa first |
190 |
|
Pa last |
120.1 |
|
P.A. Now (θ) |
120.1° |
|
| Sep first |
0.2 |
|
Sep last |
0.179 |
|
Sep. Now (ρ) |
0.179" |
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| Mag pri |
9.50 |
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Mag sec |
9.70 |
|
delta mag (ΔM) |
0.2 |
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Spectral class |
G6V (yellow) |
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| Pri motion ra |
-035 |
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Sec motion ra |
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| Pri motion dec |
-045 |
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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 28637 |
|
Constellation |
Eridanus |
|
SAO |
149684 |
|
Tycho2 |
5894-00089-1 |
|
| Gaia DR2 |
3170985216611124992 |
|
HD |
28637 |
|
ORBITAL ELEMENTS
| Period (P) | 111.55y | |
Periastron (T) | 1908.67y | |
Semi-major axis (a) | 0.213a | |
| Eccentricity (e) | 0.16 | |
Inclination (i) | 180° | |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 123.4° | |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
206.5 |
0.204 |
| 2001 |
203.0 |
0.202 |
| 2002 |
199.4 |
0.200 |
| 2003 |
195.8 |
0.198 |
| 2004 |
192.0 |
0.196 |
| 2005 |
188.3 |
0.194 |
| 2006 |
184.4 |
0.193 |
| 2007 |
180.5 |
0.191 |
| 2008 |
176.5 |
0.189 |
| 2009 |
172.4 |
0.188 |
| 2010 |
168.3 |
0.186 |
| 2011 |
164.1 |
0.185 |
| 2012 |
159.8 |
0.184 |
| 2013 |
155.5 |
0.183 |
| 2014 |
151.2 |
0.182 |
| 2015 |
146.8 |
0.181 |
| 2016 |
142.4 |
0.180 |
| 2017 |
137.9 |
0.180 |
| 2018 |
133.4 |
0.179 |
| 2019 |
128.9 |
0.179 |
| 2020 |
124.4 |
0.179 |
| 2021 |
119.9 |
0.179 |
| 2022 |
115.4 |
0.179 |
| 2023 |
110.9 |
0.180 |
| 2024 |
106.4 |
0.180 |
| 2025 |
102.0 |
0.181 |
| 2026 |
97.5 |
0.181 |
| 2027 |
93.2 |
0.182 |
| 2028 |
88.9 |
0.183 |
| 2029 |
84.6 |
0.185 |
| 2030 |
80.4 |
0.186 |
|
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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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