04318-2407 RST 2347 (HD 28845)
04h 31m 48.42s -24° 06' 36.8" P.A. 113.00 sep 0.1 mag 8.60,8.80 Sp A0V dist. 207.04 pc (675.36 l.y.)
| Coord 2000 |
04318-2407 |
|
Discov num |
RST2347 |
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Comp |
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Coord arcsec 2000 |
04 31 48.42 -24 06 36.8 |
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| Date first |
1934 |
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Date last |
2020 |
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Obs |
18 |
|
| Pa first |
8 |
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Pa last |
113.1 |
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P.A. Now (θ) |
98.2° |
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| Sep first |
0.2 |
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Sep last |
0.087 |
|
Sep. Now (ρ) |
0.088" |
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| Mag pri |
8.60 |
|
Mag sec |
8.80 |
|
delta mag (ΔM) |
0.2 |
|
Spectral class |
A0V (white) |
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| Pri motion ra |
+017 |
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Sec motion ra |
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|
| Pri motion dec |
-004 |
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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 28845 |
|
Constellation |
Eridanus |
|
SAO |
169538 |
|
HIP |
21133 |
|
| Tycho2 |
6464-02248-1 |
|
Gaia DR2 |
4897703666085905536 |
|
HD |
28845 |
|
CD |
CD-24 2401 |
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| CP |
CP-24 634 |
|
Distance |
207.04 |
|
Distance ly |
675.36 |
|
ORBITAL ELEMENTS
| Period (P) | 122.9y | ± 8.2 |
Periastron (T) | 2010.87y | ± 0.44 |
Semi-major axis (a) | 0.1734a | ± 0.0065 |
| Eccentricity (e) | 0.523 | ± 0.025 |
Inclination (i) | 129.4° | ± 4.6 |
Longitude of periastron (ω) | 339.7° | ± 5.8 |
| Node (Ω) | 163.5° | ± 4.5 |
Notes | | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
281.3 |
0.084 |
| 2001 |
274.1 |
0.078 |
| 2002 |
265.7 |
0.073 |
| 2003 |
256.1 |
0.069 |
| 2004 |
245.5 |
0.066 |
| 2005 |
234.2 |
0.064 |
| 2006 |
222.7 |
0.065 |
| 2007 |
211.7 |
0.067 |
| 2008 |
201.4 |
0.070 |
| 2009 |
192.0 |
0.073 |
| 2010 |
183.5 |
0.077 |
| 2011 |
175.7 |
0.080 |
| 2012 |
168.6 |
0.083 |
| 2013 |
161.8 |
0.085 |
| 2014 |
155.3 |
0.086 |
| 2015 |
149.0 |
0.087 |
| 2016 |
142.7 |
0.087 |
| 2017 |
136.4 |
0.087 |
| 2018 |
130.1 |
0.087 |
| 2019 |
123.7 |
0.086 |
| 2020 |
117.2 |
0.086 |
| 2021 |
110.8 |
0.086 |
| 2022 |
104.4 |
0.087 |
| 2023 |
98.2 |
0.088 |
| 2024 |
92.1 |
0.089 |
| 2025 |
86.2 |
0.091 |
| 2026 |
80.6 |
0.094 |
| 2027 |
75.3 |
0.097 |
| 2028 |
70.4 |
0.100 |
| 2029 |
65.8 |
0.103 |
| 2030 |
61.5 |
0.107 |
|
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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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