03178-1407 HU 432 (HD 20530)
03h 17m 45.24s -14° 06' 46.6" P.A. 101.00 sep 0.2 mag 10.40,10.40 Sp K0V
Coord 2000 |
03178-1407 |
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Discov num |
HU 432 |
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Comp |
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Coord arcsec 2000 |
03 17 45.24 -14 06 46.6 |
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Date first |
1901 |
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Date last |
2020 |
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Obs |
8 |
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Pa first |
46 |
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Pa last |
100.9 |
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P.A. Now (θ) |
100.9° |
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Sep first |
0.2 |
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Sep last |
0.184 |
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Sep. Now (ρ) |
0.184" |
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Mag pri |
10.40 |
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Mag sec |
10.40 |
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delta mag (ΔM) |
0 |
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Spectral class |
K0V (yellow-orange) |
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Pri motion ra |
+064 |
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Sec motion ra |
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Pri motion dec |
+027 |
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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 20530 |
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Constellation |
Eridanus |
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SAO |
148887 |
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Tycho2 |
5301-01012-1 |
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Gaia DR2 |
5155370883158999808 |
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HD |
20530 |
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ADS |
2456 |
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ORBITAL ELEMENTS
Period (P) | 73.67y | |
Periastron (T) | 1979.23y | |
Semi-major axis (a) | 0.2017a | |
Eccentricity (e) | 0.152 | |
Inclination (i) | 40.4° | |
Longitude of periastron (ω) | 223.2° | |
Node (Ω) | 45.4° | |
Notes | | |
Reference | Tok2020e | |
Equinox | | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
30.6 |
0.207 |
2001 |
34.1 |
0.211 |
2002 |
37.4 |
0.215 |
2003 |
40.5 |
0.218 |
2004 |
43.7 |
0.220 |
2005 |
46.7 |
0.222 |
2006 |
49.7 |
0.224 |
2007 |
52.7 |
0.224 |
2008 |
55.7 |
0.224 |
2009 |
58.6 |
0.224 |
2010 |
61.6 |
0.223 |
2011 |
64.7 |
0.222 |
2012 |
67.7 |
0.220 |
2013 |
70.9 |
0.217 |
2014 |
74.1 |
0.215 |
2015 |
77.4 |
0.212 |
2016 |
80.7 |
0.208 |
2017 |
84.2 |
0.205 |
2018 |
87.9 |
0.201 |
2019 |
91.6 |
0.197 |
2020 |
95.6 |
0.193 |
2021 |
99.6 |
0.190 |
2022 |
103.9 |
0.186 |
2023 |
108.3 |
0.182 |
2024 |
112.9 |
0.179 |
2025 |
117.7 |
0.175 |
2026 |
122.7 |
0.173 |
2027 |
127.8 |
0.170 |
2028 |
133.0 |
0.168 |
2029 |
138.3 |
0.167 |
2030 |
143.7 |
0.166 |
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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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