04506+1505 CHR 20 (HD 30712)
04h 50m 33.76s +15° 05' 00.6" P.A. 147.00 sep 0.1 mag 8.13,8.93 Sp G5 dist. 42.21 pc (137.69 l.y.)
| Coord 2000 |
04506+1505 |
|
Discov num |
CHR 20 |
|
Comp |
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Coord arcsec 2000 |
04 50 33.76 +15 05 00.6 |
|
| Date first |
1985 |
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Date last |
2021 |
|
Obs |
21 |
|
| Pa first |
290 |
|
Pa last |
146.7 |
|
P.A. Now (θ) |
108° |
|
| Sep first |
0.1 |
|
Sep last |
0.071 |
|
Sep. Now (ρ) |
0.073" |
|
| Mag pri |
8.13 |
|
Mag sec |
8.93 |
|
delta mag (ΔM) |
0.8 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+086 |
|
Sec motion ra |
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| Pri motion dec |
-023 |
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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 30712 |
|
Constellation |
Orion |
|
SAO |
94159 |
|
HIP |
22505 |
|
| Tycho2 |
1280-00662-1 |
|
Gaia DR2 |
3404812685132622592 |
|
HD |
30712 |
|
BD |
BD+14 770 |
|
| Distance |
42.21 |
|
Distance ly |
137.69 |
|
ORBITAL ELEMENTS
| Period (P) | 5.734y | ± 0.006 |
Periastron (T) | 2003.862y | ± 0.101 |
Semi-major axis (a) | 0.089a | ± 0.003 |
| Eccentricity (e) | 0.066 | ± 0.006 |
Inclination (i) | 116.7° | ± 1.5 |
Longitude of periastron (ω) | 95° | ± 6 |
| Node (Ω) | 310.5° | ± 1 |
Notes | n | |
Reference | Doc2018h | |
| Equinox | 2000 | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
110.5 |
0.076 |
| 2001 |
28.9 |
0.043 |
| 2002 |
324.1 |
0.083 |
| 2003 |
293.4 |
0.074 |
| 2004 |
189.9 |
0.042 |
| 2005 |
133.3 |
0.087 |
| 2006 |
98.4 |
0.064 |
| 2007 |
1.5 |
0.051 |
| 2008 |
316.2 |
0.089 |
| 2009 |
280.0 |
0.059 |
| 2010 |
164.3 |
0.056 |
| 2011 |
125.6 |
0.088 |
| 2012 |
80.5 |
0.052 |
| 2013 |
343.4 |
0.064 |
| 2014 |
308.7 |
0.089 |
| 2015 |
257.4 |
0.044 |
| 2016 |
149.6 |
0.071 |
| 2017 |
117.6 |
0.083 |
| 2018 |
53.4 |
0.043 |
| 2019 |
331.2 |
0.076 |
| 2020 |
300.7 |
0.082 |
| 2021 |
219.6 |
0.037 |
| 2022 |
139.5 |
0.082 |
| 2023 |
108.0 |
0.073 |
| 2024 |
21.5 |
0.045 |
| 2025 |
322.1 |
0.085 |
| 2026 |
290.6 |
0.071 |
| 2027 |
182.3 |
0.045 |
| 2028 |
131.4 |
0.088 |
| 2029 |
94.8 |
0.061 |
| 2030 |
356.4 |
0.054 |
|
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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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