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 |
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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 |
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Obs |
12 |
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Pa first |
343 |
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Pa last |
316.6 |
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P.A. Now (θ) |
316.5° |
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Sep first |
0.3 |
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Sep last |
0.295 |
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Sep. Now (ρ) |
0.295" |
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Mag pri |
10.03 |
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Mag sec |
10.45 |
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delta mag (ΔM) |
0.42 |
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Spectral class |
G8V (yellow) |
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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 |
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Constellation |
Caelum |
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SAO |
195337 |
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HIP |
22484 |
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Tycho2 |
7046-00878-1 |
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HD |
30906 |
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CD |
CD-31 2055 |
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CP |
CP-31 623 |
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Distance |
88.57 |
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Distance ly |
288.92 |
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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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