00284-2020 B 1909 (HD 2475)
00h 28m 21.17s -20° 20' 05.2" P.A. 321.00 sep 0.1 mag 7.23,7.40 Sp G0V dist. 32.2 pc (105.04 l.y.)
| Coord 2000 |
00284-2020 |
|
Discov num |
B 1909 |
|
Comp |
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Coord arcsec 2000 |
00 28 21.17 -20 20 05.2 |
|
| Date first |
1929 |
|
Date last |
2021 |
|
Obs |
92 |
|
| Pa first |
119 |
|
Pa last |
320.5 |
|
P.A. Now (θ) |
13.6° |
|
| Sep first |
0.2 |
|
Sep last |
0.143 |
|
Sep. Now (ρ) |
0.073" |
|
| Mag pri |
7.23 |
|
Mag sec |
7.40 |
|
delta mag (ΔM) |
0.17 |
|
Spectral class |
G0V (yellow) |
|
| Pri motion ra |
-116 |
|
Sec motion ra |
|
|
| Pri motion dec |
-114 |
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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 2475 |
|
Constellation |
Cetus |
|
SAO |
166296 |
|
HIP |
2237 |
|
| Tycho2 |
5846-00959-1 |
|
Gaia DR2 |
2363291052952046208 |
|
HD |
2475 |
|
HR |
108 |
|
| GC |
554 |
|
BD |
BD-21 57 |
|
FK5 |
2029 |
|
Distance |
32.2 |
|
| Distance ly |
105.04 |
|
ORBITAL ELEMENTS
| Period (P) | 11.35y | |
Periastron (T) | 1995.09y | |
Semi-major axis (a) | 0.202a | |
| Eccentricity (e) | 0.005 | |
Inclination (i) | 69.8° | |
Longitude of periastron (ω) | 99° | |
| Node (Ω) | 119.49° | |
Notes | n | |
Reference | Hrt2010a | |
| Equinox | 2000 | |
Last observation | 2009 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
351.6 |
0.086 |
| 2001 |
69.9 |
0.088 |
| 2002 |
102.1 |
0.157 |
| 2003 |
115.8 |
0.199 |
| 2004 |
127.1 |
0.190 |
| 2005 |
144.0 |
0.133 |
| 2006 |
195.0 |
0.071 |
| 2007 |
265.3 |
0.110 |
| 2008 |
287.7 |
0.176 |
| 2009 |
299.8 |
0.202 |
| 2010 |
311.9 |
0.175 |
| 2011 |
334.7 |
0.109 |
| 2012 |
44.8 |
0.072 |
| 2013 |
94.7 |
0.134 |
| 2014 |
111.7 |
0.190 |
| 2015 |
123.0 |
0.199 |
| 2016 |
136.6 |
0.157 |
| 2017 |
169.2 |
0.087 |
| 2018 |
248.7 |
0.086 |
| 2019 |
282.1 |
0.156 |
| 2020 |
295.9 |
0.199 |
| 2021 |
307.2 |
0.190 |
| 2022 |
324.1 |
0.134 |
| 2023 |
13.6 |
0.073 |
| 2024 |
84.0 |
0.109 |
| 2025 |
107.0 |
0.175 |
| 2026 |
119.1 |
0.202 |
| 2027 |
131.0 |
0.177 |
| 2028 |
153.0 |
0.111 |
| 2029 |
222.4 |
0.071 |
| 2030 |
274.5 |
0.132 |
|
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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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