02514-2139 DON 43 (HD 17884)
02h 51m 21.23s -21° 38' 40.9" P.A. 287.00 sep 0.2 mag 9.80,10.00 Sp F2+F4 dist. 73.05 pc (238.29 l.y.)
Coord 2000 |
02514-2139 |
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Discov num |
DON 43 |
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Comp |
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Coord arcsec 2000 |
02 51 21.23 -21 38 40.9 |
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Date first |
1930 |
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Date last |
2021 |
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Obs |
15 |
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Pa first |
334 |
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Pa last |
287.4 |
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P.A. Now (θ) |
295.5° |
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Sep first |
0.2 |
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Sep last |
0.209 |
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Sep. Now (ρ) |
0.202" |
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Mag pri |
9.80 |
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Mag sec |
10.00 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
F2+F4 (yellow-white/yellow-white) |
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Pri motion ra |
+073 |
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Sec motion ra |
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Pri motion dec |
-001 |
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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 17884 |
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Constellation |
Eridanus |
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HIP |
13317 |
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Tycho2 |
5870-00612-1 |
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HD |
17884 |
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CD |
CD-30 1072 |
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CP |
CP-30 349 |
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Distance |
73.05 |
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Distance ly |
238.29 |
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ORBITAL ELEMENTS
Period (P) | 108.42y | ± 2.5 |
Periastron (T) | 1972.75y | ± 0.3 |
Semi-major axis (a) | 0.242a | ± 0.004 |
Eccentricity (e) | 0.362 | ± 0.003 |
Inclination (i) | 52.1° | ± 0.5 |
Longitude of periastron (ω) | 94.1° | ± 2.5 |
Node (Ω) | 29.6° | ± 0.5 |
Notes | n | |
Reference | Doc2016i | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
239.3 |
0.229 |
2001 |
241.4 |
0.229 |
2002 |
243.6 |
0.228 |
2003 |
245.7 |
0.226 |
2004 |
247.9 |
0.225 |
2005 |
250.1 |
0.224 |
2006 |
252.4 |
0.222 |
2007 |
254.6 |
0.220 |
2008 |
256.9 |
0.219 |
2009 |
259.3 |
0.217 |
2010 |
261.7 |
0.215 |
2011 |
264.1 |
0.214 |
2012 |
266.5 |
0.212 |
2013 |
269.0 |
0.211 |
2014 |
271.5 |
0.209 |
2015 |
274.1 |
0.208 |
2016 |
276.7 |
0.207 |
2017 |
279.3 |
0.205 |
2018 |
282.0 |
0.204 |
2019 |
284.6 |
0.204 |
2020 |
287.3 |
0.203 |
2021 |
290.0 |
0.202 |
2022 |
292.8 |
0.202 |
2023 |
295.5 |
0.202 |
2024 |
298.2 |
0.202 |
2025 |
300.9 |
0.202 |
2026 |
303.7 |
0.203 |
2027 |
306.4 |
0.203 |
2028 |
309.0 |
0.204 |
2029 |
311.7 |
0.205 |
2030 |
314.3 |
0.206 |
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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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