08447-4238 CHR 238 (HD 74842)
08h 44m 44.97s -42° 38' 04.4" P.A. 22.00 sep 0.1 mag 7.22,8.30 Sp K0V: dist. 25.27 pc (82.43 l.y.)
| Coord 2000 |
08447-4238 |
|
Discov num |
CHR 238 |
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Comp |
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Coord arcsec 2000 |
08 44 44.97 -42 38 04.4 |
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| Date first |
1996 |
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Date last |
2021 |
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Obs |
20 |
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| Pa first |
218 |
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Pa last |
21.7 |
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P.A. Now (θ) |
21.7° |
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| Sep first |
0.1 |
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Sep last |
0.076 |
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Sep. Now (ρ) |
0.076" |
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| Mag pri |
7.22 |
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Mag sec |
8.30 |
|
delta mag (ΔM) |
1.08 |
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Spectral class |
K0V: (yellow-orange) |
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| Pri motion ra |
-006 |
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Sec motion ra |
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| Pri motion dec |
-280 |
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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 74842 |
|
Constellation |
Vela |
|
SAO |
220383 |
|
HIP |
42916 |
|
| Tycho2 |
7683-01655-1 |
|
Gaia DR2 |
5524839844162098048 |
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HD |
74842 |
|
GC |
12062 |
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| GL |
Gl 321.2 |
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CD |
CD-42 4577 |
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CP |
CP-42 2889 |
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Distance |
25.27 |
|
| Distance ly |
82.43 |
|
ORBITAL ELEMENTS
| Period (P) | 2.262y | ± 0.001 |
Periastron (T) | 2012.584y | ± 0.007 |
Semi-major axis (a) | 0.0775a | ± 0.0015 |
| Eccentricity (e) | 0.676 | ± 0.007 |
Inclination (i) | 152.2° | ± 3.8 |
Longitude of periastron (ω) | 125.2° | ± 5.1 |
| Node (Ω) | 13° | ± 5.2 |
Notes | n | |
Reference | Tok2017b | |
| Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
70.7 |
0.117 |
| 2001 |
14.0 |
0.070 |
| 2002 |
83.8 |
0.105 |
| 2003 |
36.2 |
0.101 |
| 2004 |
101.8 |
0.085 |
| 2005 |
49.9 |
0.116 |
| 2006 |
137.1 |
0.053 |
| 2007 |
61.4 |
0.121 |
| 2008 |
308.3 |
0.028 |
| 2009 |
72.9 |
0.116 |
| 2010 |
19.5 |
0.077 |
| 2011 |
86.5 |
0.102 |
| 2012 |
39.0 |
0.105 |
| 2013 |
106.2 |
0.080 |
| 2014 |
52.1 |
0.118 |
| 2015 |
149.3 |
0.046 |
| 2016 |
63.4 |
0.120 |
| 2017 |
336.6 |
0.038 |
| 2018 |
75.2 |
0.114 |
| 2019 |
24.1 |
0.084 |
| 2020 |
89.5 |
0.099 |
| 2021 |
41.7 |
0.108 |
| 2022 |
111.2 |
0.074 |
| 2023 |
54.2 |
0.119 |
| 2024 |
166.2 |
0.038 |
| 2025 |
65.5 |
0.120 |
| 2026 |
352.8 |
0.049 |
| 2027 |
77.5 |
0.112 |
| 2028 |
28.1 |
0.089 |
| 2029 |
92.7 |
0.095 |
| 2030 |
44.2 |
0.111 |
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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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