04502-3113 B 1474 (HD 30906)
04h 50m 13.57s -31° 12' 29.5" P.A. 317.00 sep 0.3 mag 10.03,10.45 Sp G8V dist. 88.57 pc (288.92 l.y.)
| Coord 2000 |
04502-3113 |
|
Discov num |
B 1474 |
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Comp |
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Coord arcsec 2000 |
04 50 13.57 -31 12 29.5 |
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| Date first |
1929 |
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Date last |
2021 |
|
Obs |
12 |
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| Pa first |
343 |
|
Pa last |
316.6 |
|
P.A. Now (θ) |
316.5° |
|
| Sep first |
0.3 |
|
Sep last |
0.295 |
|
Sep. Now (ρ) |
0.295" |
|
| Mag pri |
10.03 |
|
Mag sec |
10.45 |
|
delta mag (ΔM) |
0.42 |
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Spectral class |
G8V (yellow) |
|
| Pri motion ra |
+020 |
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Sec motion ra |
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| Pri motion dec |
-022 |
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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 30906 |
|
Constellation |
Caelum |
|
SAO |
195337 |
|
HIP |
22484 |
|
| Tycho2 |
7046-00878-1 |
|
HD |
30906 |
|
CD |
CD-31 2055 |
|
CP |
CP-31 623 |
|
| Distance |
88.57 |
|
Distance ly |
288.92 |
|
ORBITAL ELEMENTS
| Period (P) | 102.78y | |
Periastron (T) | 1953.13y | |
Semi-major axis (a) | 0.289a | |
| Eccentricity (e) | 0.05 | |
Inclination (i) | 14.9° | |
Longitude of periastron (ω) | 315.7° | |
| Node (Ω) | 121.6° | |
Notes | n | |
Reference | Hrt2011d | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
243.8 |
0.296 |
| 2001 |
247.0 |
0.296 |
| 2002 |
250.3 |
0.297 |
| 2003 |
253.4 |
0.298 |
| 2004 |
256.6 |
0.298 |
| 2005 |
259.8 |
0.299 |
| 2006 |
263.0 |
0.299 |
| 2007 |
266.1 |
0.300 |
| 2008 |
269.2 |
0.300 |
| 2009 |
272.4 |
0.300 |
| 2010 |
275.5 |
0.301 |
| 2011 |
278.6 |
0.301 |
| 2012 |
281.7 |
0.301 |
| 2013 |
284.9 |
0.301 |
| 2014 |
288.0 |
0.301 |
| 2015 |
291.1 |
0.300 |
| 2016 |
294.2 |
0.300 |
| 2017 |
297.4 |
0.300 |
| 2018 |
300.5 |
0.299 |
| 2019 |
303.7 |
0.299 |
| 2020 |
306.9 |
0.298 |
| 2021 |
310.1 |
0.297 |
| 2022 |
313.3 |
0.296 |
| 2023 |
316.5 |
0.295 |
| 2024 |
319.7 |
0.294 |
| 2025 |
323.0 |
0.293 |
| 2026 |
326.3 |
0.292 |
| 2027 |
329.7 |
0.290 |
| 2028 |
333.0 |
0.289 |
| 2029 |
336.4 |
0.287 |
| 2030 |
339.9 |
0.286 |
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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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