00465-0131 RST 4157 (HD 4424)
00h 46m 31.18s -01° 30' 31.3" P.A. 80.00 sep 0.1 mag 10.00,10.00 Sp G0
| Coord 2000 |
00465-0131 |
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Discov num |
RST4157 |
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Comp |
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Coord arcsec 2000 |
00 46 31.18 -01 30 31.3 |
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| Date first |
1939 |
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Date last |
2020 |
|
Obs |
9 |
|
| Pa first |
95 |
|
Pa last |
79.6 |
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P.A. Now (θ) |
79.6° |
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| Sep first |
0.3 |
|
Sep last |
0.135 |
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Sep. Now (ρ) |
0.135" |
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| Mag pri |
10.00 |
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Mag sec |
10.00 |
|
delta mag (ΔM) |
0 |
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Spectral class |
G0 (yellow) |
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| Pri motion ra |
+047 |
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Sec motion ra |
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| Pri motion dec |
-027 |
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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 4424 |
|
Constellation |
Cetus |
|
SAO |
128948 |
|
Tycho2 |
4673-00637-1 |
|
| Gaia DR2 |
2530623936580943488 |
|
HD |
4424 |
|
ORBITAL ELEMENTS
| Period (P) | 94.8y | |
Periastron (T) | 2008.2y | |
Semi-major axis (a) | 0.161a | |
| Eccentricity (e) | 0.647 | |
Inclination (i) | 59° | |
Longitude of periastron (ω) | 200.6° | |
| Node (Ω) | 97.8° | |
Notes | | |
Reference | Tok2020g | |
| Equinox | 2000 | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
193.6 |
0.060 |
| 2001 |
204.9 |
0.057 |
| 2002 |
217.0 |
0.056 |
| 2003 |
229.4 |
0.056 |
| 2004 |
241.4 |
0.057 |
| 2005 |
252.8 |
0.059 |
| 2006 |
263.6 |
0.060 |
| 2007 |
274.5 |
0.059 |
| 2008 |
286.2 |
0.055 |
| 2009 |
300.4 |
0.049 |
| 2010 |
319.4 |
0.042 |
| 2011 |
344.3 |
0.038 |
| 2012 |
10.6 |
0.040 |
| 2013 |
31.5 |
0.047 |
| 2014 |
45.8 |
0.058 |
| 2015 |
55.5 |
0.069 |
| 2016 |
62.4 |
0.081 |
| 2017 |
67.5 |
0.093 |
| 2018 |
71.5 |
0.104 |
| 2019 |
74.7 |
0.115 |
| 2020 |
77.3 |
0.126 |
| 2021 |
79.6 |
0.136 |
| 2022 |
81.6 |
0.145 |
| 2023 |
83.3 |
0.154 |
| 2024 |
84.8 |
0.162 |
| 2025 |
86.2 |
0.170 |
| 2026 |
87.5 |
0.178 |
| 2027 |
88.7 |
0.185 |
| 2028 |
89.8 |
0.192 |
| 2029 |
90.8 |
0.198 |
| 2030 |
91.8 |
0.204 |
|
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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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