00462-2214 RST 4155 (HD 4397)
00h 46m 11.05s -22° 14' 29.3" P.A. 236.00 sep 0.2 mag 9.76,10.03 Sp F9V+G1V dist. 93.81 pc (306.01 l.y.)
| Coord 2000 |
00462-2214 |
|
Discov num |
RST4155 |
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Comp |
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Coord arcsec 2000 |
00 46 11.05 -22 14 29.3 |
|
| Date first |
1940 |
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Date last |
2021 |
|
Obs |
19 |
|
| Pa first |
344 |
|
Pa last |
236.4 |
|
P.A. Now (θ) |
229.7° |
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| Sep first |
0.2 |
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Sep last |
0.169 |
|
Sep. Now (ρ) |
0.175" |
|
| Mag pri |
9.76 |
|
Mag sec |
10.03 |
|
delta mag (ΔM) |
0.27 |
|
Spectral class |
F9V+G1V (yellow-white/yellow) |
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| Pri motion ra |
-014 |
|
Sec motion ra |
|
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| Pri motion dec |
+020 |
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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 4397 |
|
Constellation |
Cetus |
|
SAO |
166554 |
|
HIP |
3606 |
|
| Tycho2 |
5849-02187-1 |
|
Gaia DR2 |
2349543584191606144 |
|
HD |
4397 |
|
CD |
CD-22 248 |
|
| CP |
CP-22 81 |
|
Distance |
93.81 |
|
Distance ly |
306.01 |
|
ORBITAL ELEMENTS
| Period (P) | 49.27y | ± 1.13 |
Periastron (T) | 2003.49y | ± 0.53 |
Semi-major axis (a) | 0.1693a | ± 0.0044 |
| Eccentricity (e) | 0.305 | ± 0.022 |
Inclination (i) | 138° | ± 2.3 |
Longitude of periastron (ω) | 141.7° | ± 2.5 |
| Node (Ω) | 177.9° | ± 4.3 |
Notes | | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
82.4 |
0.095 |
| 2001 |
65.7 |
0.094 |
| 2002 |
49.5 |
0.098 |
| 2003 |
34.9 |
0.104 |
| 2004 |
21.9 |
0.111 |
| 2005 |
10.5 |
0.117 |
| 2006 |
0.3 |
0.123 |
| 2007 |
350.8 |
0.127 |
| 2008 |
341.7 |
0.129 |
| 2009 |
332.9 |
0.130 |
| 2010 |
324.2 |
0.131 |
| 2011 |
315.5 |
0.131 |
| 2012 |
306.8 |
0.131 |
| 2013 |
298.2 |
0.131 |
| 2014 |
289.7 |
0.133 |
| 2015 |
281.4 |
0.135 |
| 2016 |
273.5 |
0.138 |
| 2017 |
265.9 |
0.142 |
| 2018 |
258.7 |
0.146 |
| 2019 |
252.1 |
0.152 |
| 2020 |
245.8 |
0.157 |
| 2021 |
240.1 |
0.163 |
| 2022 |
234.7 |
0.169 |
| 2023 |
229.7 |
0.175 |
| 2024 |
225.0 |
0.181 |
| 2025 |
220.6 |
0.187 |
| 2026 |
216.5 |
0.192 |
| 2027 |
212.5 |
0.196 |
| 2028 |
208.8 |
0.201 |
| 2029 |
205.1 |
0.204 |
| 2030 |
201.6 |
0.207 |
|
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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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