04584-0344 HDS 644 (HD 31768)
04h 58m 26.15s -03° 43' 58.8" P.A. 178.00 sep 0.7 mag 7.12,10.40 Sp F5 dist. 50.84 pc (165.84 l.y.)
Coord 2000 |
04584-0344 |
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Discov num |
HDS 644 |
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Comp |
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Coord arcsec 2000 |
04 58 26.15 -03 43 58.8 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
29 |
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Pa first |
103 |
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Pa last |
178.3 |
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P.A. Now (θ) |
178.3° |
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Sep first |
0.6 |
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Sep last |
0.699 |
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Sep. Now (ρ) |
0.699" |
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Mag pri |
7.12 |
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Mag sec |
10.40 |
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delta mag (ΔM) |
3.28 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
+078 |
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Sec motion ra |
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Pri motion dec |
+048 |
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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 31768 |
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Constellation |
Orion |
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SAO |
131645 |
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HIP |
23116 |
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Tycho2 |
4741-01620-1 |
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Gaia DR2 |
3212750058416680320 |
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HD |
31768 |
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GC |
6067 |
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BD |
BD-03 953 |
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Distance |
50.84 |
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Distance ly |
165.84 |
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ORBITAL ELEMENTS
Period (P) | 127y | |
Periastron (T) | 1944.9y | |
Semi-major axis (a) | 0.743a | |
Eccentricity (e) | 0.3 | |
Inclination (i) | 55.1° | |
Longitude of periastron (ω) | 283.4° | |
Node (Ω) | 36.9° | |
Notes | | |
Reference | Tok2019d | |
Equinox | 2000 | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
126.6 |
0.546 |
2001 |
129.5 |
0.548 |
2002 |
132.3 |
0.551 |
2003 |
135.1 |
0.554 |
2004 |
137.9 |
0.558 |
2005 |
140.6 |
0.562 |
2006 |
143.3 |
0.568 |
2007 |
145.9 |
0.573 |
2008 |
148.5 |
0.580 |
2009 |
151.0 |
0.586 |
2010 |
153.5 |
0.594 |
2011 |
155.9 |
0.601 |
2012 |
158.2 |
0.609 |
2013 |
160.5 |
0.618 |
2014 |
162.7 |
0.626 |
2015 |
164.8 |
0.635 |
2016 |
166.9 |
0.644 |
2017 |
168.9 |
0.653 |
2018 |
170.9 |
0.662 |
2019 |
172.8 |
0.671 |
2020 |
174.7 |
0.680 |
2021 |
176.5 |
0.689 |
2022 |
178.3 |
0.698 |
2023 |
180.0 |
0.706 |
2024 |
181.7 |
0.715 |
2025 |
183.4 |
0.723 |
2026 |
185.0 |
0.730 |
2027 |
186.6 |
0.737 |
2028 |
188.1 |
0.744 |
2029 |
189.7 |
0.751 |
2030 |
191.2 |
0.756 |
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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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