04257-0214 BU 403 (HD 28072)
04h 25m 41.85s -02° 13' 56.8" P.A. 81.00 sep 0.9 mag 7.47,9.42 Sp F8 dist. 42.74 pc (139.42 l.y.)
Coord 2000 |
04257-0214 |
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Discov num |
BU 403 |
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Comp |
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Coord arcsec 2000 |
04 25 41.85 -02 13 56.8 |
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Date first |
1877 |
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Date last |
2021 |
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Obs |
55 |
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Pa first |
101 |
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Pa last |
81 |
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P.A. Now (θ) |
81° |
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Sep first |
2.0 |
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Sep last |
0.866 |
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Sep. Now (ρ) |
0.866" |
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Mag pri |
7.47 |
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Mag sec |
9.42 |
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delta mag (ΔM) |
1.95 |
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Spectral class |
F8 (yellow-white) |
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Pri motion ra |
+058 |
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Sec motion ra |
+058 |
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Pri motion dec |
+003 |
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Sec motion dec |
+003 |
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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 28072 |
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Constellation |
Eridanus |
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HIP |
20673 |
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Tycho2 |
4727-01564-1 |
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Gaia DR2 |
3205679721908034688 |
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HD |
28072 |
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ADS |
3214 |
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BD |
BD-02 899 |
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Distance |
42.74 |
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Distance ly |
139.42 |
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ORBITAL ELEMENTS
Period (P) | 591.8784y | ± 531.0418 |
Periastron (T) | 1813.2516y | ± 38.4593 |
Semi-major axis (a) | 3.48625a | ± 3.49971 |
Eccentricity (e) | 0.77632 | ± 0.18548 |
Inclination (i) | 93.249° | ± 2.561 |
Longitude of periastron (ω) | 273.16° | ± 28.04 |
Node (Ω) | 103.414° | ± 2.192 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
87.2 |
1.115 |
2001 |
87.0 |
1.104 |
2002 |
86.8 |
1.092 |
2003 |
86.5 |
1.081 |
2004 |
86.3 |
1.069 |
2005 |
86.1 |
1.058 |
2006 |
85.8 |
1.046 |
2007 |
85.6 |
1.035 |
2008 |
85.3 |
1.023 |
2009 |
85.1 |
1.012 |
2010 |
84.8 |
1.000 |
2011 |
84.6 |
0.989 |
2012 |
84.3 |
0.977 |
2013 |
84.0 |
0.966 |
2014 |
83.7 |
0.954 |
2015 |
83.4 |
0.943 |
2016 |
83.1 |
0.931 |
2017 |
82.8 |
0.920 |
2018 |
82.5 |
0.908 |
2019 |
82.2 |
0.897 |
2020 |
81.8 |
0.885 |
2021 |
81.5 |
0.874 |
2022 |
81.2 |
0.862 |
2023 |
80.8 |
0.851 |
2024 |
80.4 |
0.839 |
2025 |
80.0 |
0.828 |
2026 |
79.7 |
0.816 |
2027 |
79.2 |
0.805 |
2028 |
78.8 |
0.794 |
2029 |
78.4 |
0.782 |
2030 |
78.0 |
0.771 |
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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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