02278+0426 A 2329 (HD 15285)
02h 27m 45.86s +04° 25' 55.9" P.A. 109.00 sep 0.6 mag 9.45,9.63 Sp K5 dist. 17.14 pc (55.91 l.y.)
Coord 2000 |
02278+0426 |
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Discov num |
A 2329 |
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Comp |
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Coord arcsec 2000 |
02 27 45.86 +04 25 55.9 |
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Date first |
1911 |
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Date last |
2020 |
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Obs |
138 |
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Pa first |
300 |
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Pa last |
109.3 |
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P.A. Now (θ) |
116.3° |
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Sep first |
0.4 |
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Sep last |
0.63 |
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Sep. Now (ρ) |
0.616" |
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Mag pri |
9.45 |
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Mag sec |
9.63 |
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delta mag (ΔM) |
0.18 |
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Spectral class |
K5 (yellow-orange) |
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Pri motion ra |
+141 |
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Sec motion ra |
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Pri motion dec |
+208 |
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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 15285 |
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Constellation |
Cetus |
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HIP |
11452 |
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Tycho2 |
0042-00911-1 |
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Gaia DR2 |
2515752565074318720 |
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HD |
15285 |
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ADS |
1865 |
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GL |
Gl 98A |
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BD |
BD+03 339 |
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Distance |
17.14 |
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Distance ly |
55.91 |
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ORBITAL ELEMENTS
Period (P) | 25.255y | ± 0.021 |
Periastron (T) | 56417.3d (2013.341y) | ± 4.7 |
Semi-major axis (a) | 559.84m | ± 0.66 |
Eccentricity (e) | 0.2354 | ± 0.0013 |
Inclination (i) | 73.389° | ± 0.048 |
Longitude of periastron (ω) | 231.49° | ± 0.21 |
Node (Ω) | 109.116° | ± 0.022 |
Notes | n | |
Reference | MnA2019 | |
Equinox | | |
Last observation | 2017 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
125.1 |
0.508 |
2001 |
130.7 |
0.436 |
2002 |
138.6 |
0.356 |
2003 |
151.4 |
0.275 |
2004 |
173.5 |
0.208 |
2005 |
207.3 |
0.186 |
2006 |
238.6 |
0.223 |
2007 |
257.7 |
0.294 |
2008 |
269.2 |
0.368 |
2009 |
277.0 |
0.429 |
2010 |
283.1 |
0.465 |
2011 |
288.8 |
0.463 |
2012 |
295.2 |
0.415 |
2013 |
304.3 |
0.323 |
2014 |
323.1 |
0.203 |
2015 |
18.1 |
0.128 |
2016 |
71.6 |
0.207 |
2017 |
89.5 |
0.334 |
2018 |
97.7 |
0.447 |
2019 |
102.9 |
0.535 |
2020 |
106.7 |
0.594 |
2021 |
110.1 |
0.626 |
2022 |
113.2 |
0.633 |
2023 |
116.3 |
0.616 |
2024 |
119.8 |
0.579 |
2025 |
123.9 |
0.524 |
2026 |
129.1 |
0.455 |
2027 |
136.3 |
0.377 |
2028 |
147.5 |
0.295 |
2029 |
166.6 |
0.223 |
2030 |
198.0 |
0.186 |
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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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