02517-5234 HU 1562 (HD 18025)
02h 51m 42.71s -52° 33' 34.2" P.A. 80.00 sep 0.1 mag 8.79,9.71 Sp G3V dist. 78.68 pc (256.65 l.y.)
Coord 2000 |
02517-5234 |
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Discov num |
HU 1562 |
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Comp |
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Coord arcsec 2000 |
02 51 42.71 -52 33 34.2 |
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Date first |
1914 |
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Date last |
2021 |
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Obs |
27 |
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Pa first |
59 |
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Pa last |
79.6 |
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P.A. Now (θ) |
75.9° |
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Sep first |
0.5 |
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Sep last |
0.098 |
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Sep. Now (ρ) |
0.139" |
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Mag pri |
8.79 |
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Mag sec |
9.71 |
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delta mag (ΔM) |
0.92 |
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Spectral class |
G3V (yellow) |
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Pri motion ra |
-015 |
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Sec motion ra |
-015 |
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Pri motion dec |
-112 |
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Sec motion dec |
-112 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 18025 |
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Constellation |
Horologium |
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SAO |
232919 |
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HIP |
13341 |
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Tycho2 |
8491-01096-1 |
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Gaia DR2 |
4741933792193863040 |
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HD |
18025 |
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CP |
CP-53 489 |
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Distance |
78.68 |
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Distance ly |
256.65 |
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ORBITAL ELEMENTS
Period (P) | 67.62y | ± 1.07 |
Periastron (T) | 2019.94y | ± 0.17 |
Semi-major axis (a) | 0.2588a | ± 0.0036 |
Eccentricity (e) | 0.95 | ± 0.022 |
Inclination (i) | 128.9° | ± 11.5 |
Longitude of periastron (ω) | 168.9° | ± 6.8 |
Node (Ω) | 49.1° | ± 3.5 |
Notes | | |
Reference | Tok2020e | |
Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
52.0 |
0.448 |
2001 |
51.6 |
0.440 |
2002 |
51.2 |
0.430 |
2003 |
50.8 |
0.420 |
2004 |
50.4 |
0.409 |
2005 |
50.0 |
0.398 |
2006 |
49.6 |
0.385 |
2007 |
49.1 |
0.371 |
2008 |
48.5 |
0.357 |
2009 |
48.0 |
0.341 |
2010 |
47.3 |
0.324 |
2011 |
46.6 |
0.305 |
2012 |
45.8 |
0.285 |
2013 |
44.9 |
0.264 |
2014 |
43.8 |
0.240 |
2015 |
42.4 |
0.213 |
2016 |
40.7 |
0.184 |
2017 |
38.1 |
0.151 |
2018 |
34.0 |
0.111 |
2019 |
24.2 |
0.062 |
2020 |
212.0 |
0.013 |
2021 |
92.2 |
0.059 |
2022 |
80.8 |
0.102 |
2023 |
75.9 |
0.139 |
2024 |
72.9 |
0.170 |
2025 |
70.9 |
0.199 |
2026 |
69.3 |
0.224 |
2027 |
68.1 |
0.248 |
2028 |
67.0 |
0.270 |
2029 |
66.1 |
0.290 |
2030 |
65.3 |
0.308 |
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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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