04460-0659 BU 186 (HD 30301)
04h 45m 59.70s -06° 59' 16.9" P.A. 28.00 sep 0.4 mag 7.81,9.73 Sp G0 dist. 71.84 pc (234.34 l.y.)
| Coord 2000 |
04460-0659 |
|
Discov num |
BU 186 |
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Comp |
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Coord arcsec 2000 |
04 45 59.70 -06 59 16.9 |
|
| Date first |
1875 |
|
Date last |
2012 |
|
Obs |
26 |
|
| Pa first |
174 |
|
Pa last |
28.3 |
|
P.A. Now (θ) |
28.3° |
|
| Sep first |
2.0 |
|
Sep last |
0.365 |
|
Sep. Now (ρ) |
0.365" |
|
| Mag pri |
7.81 |
|
Mag sec |
9.73 |
|
delta mag (ΔM) |
1.92 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
-020 |
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Sec motion ra |
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| Pri motion dec |
-091 |
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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 30301 |
|
Constellation |
Eridanus |
|
SAO |
131476 |
|
HIP |
22151 |
|
| Tycho2 |
4748-00877-1 |
|
Gaia DR2 |
3187863544730735104 |
|
HD |
30301 |
|
ADS |
3430 |
|
| BD |
BD-07 893 |
|
Distance |
71.84 |
|
Distance ly |
234.34 |
|
ORBITAL ELEMENTS
| Period (P) | 729.6y | |
Periastron (T) | 1999.78y | |
Semi-major axis (a) | 1.53a | |
| Eccentricity (e) | 0.806 | |
Inclination (i) | 55.6° | |
Longitude of periastron (ω) | 150.2° | |
| Node (Ω) | 178.1° | |
Notes | | |
Reference | FMR2015a | |
| Equinox | 2000 | |
Last observation | 2012 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
341.3 |
0.274 |
| 2001 |
346.3 |
0.286 |
| 2002 |
350.8 |
0.298 |
| 2003 |
355.0 |
0.308 |
| 2004 |
358.9 |
0.317 |
| 2005 |
2.7 |
0.325 |
| 2006 |
6.3 |
0.332 |
| 2007 |
9.7 |
0.338 |
| 2008 |
13.0 |
0.343 |
| 2009 |
16.2 |
0.348 |
| 2010 |
19.4 |
0.351 |
| 2011 |
22.5 |
0.355 |
| 2012 |
25.6 |
0.358 |
| 2013 |
28.6 |
0.360 |
| 2014 |
31.5 |
0.363 |
| 2015 |
34.4 |
0.366 |
| 2016 |
37.3 |
0.368 |
| 2017 |
40.1 |
0.371 |
| 2018 |
42.9 |
0.374 |
| 2019 |
45.6 |
0.378 |
| 2020 |
48.3 |
0.381 |
| 2021 |
50.9 |
0.385 |
| 2022 |
53.5 |
0.389 |
| 2023 |
56.0 |
0.394 |
| 2024 |
58.5 |
0.398 |
| 2025 |
60.9 |
0.404 |
| 2026 |
63.2 |
0.409 |
| 2027 |
65.5 |
0.415 |
| 2028 |
67.7 |
0.421 |
| 2029 |
69.9 |
0.427 |
| 2030 |
72.0 |
0.434 |
|
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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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