00593-0040 A 1902 (HD 5781)
00h 59m 20.47s -00° 40' 28.3" P.A. 220.00 sep 0.4 mag 8.11,9.17 Sp F5 dist. 87.49 pc (285.39 l.y.)
Coord 2000 |
00593-0040 |
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Discov num |
A 1902 |
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Comp |
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Coord arcsec 2000 |
00 59 20.47 -00 40 28.3 |
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Date first |
1908 |
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Date last |
2019 |
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Obs |
75 |
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Pa first |
199 |
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Pa last |
220.4 |
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P.A. Now (θ) |
223.8° |
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Sep first |
0.3 |
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Sep last |
0.36 |
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Sep. Now (ρ) |
0.352" |
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Mag pri |
8.11 |
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Mag sec |
9.17 |
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delta mag (ΔM) |
1.06 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
+028 |
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Sec motion ra |
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Pri motion dec |
-034 |
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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 5781 |
|
Constellation |
Cetus |
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SAO |
129063 |
|
HIP |
4619 |
|
Tycho2 |
4674-00743-1 |
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HD |
5781 |
|
ADS |
819 |
|
BD |
BD-01 124 |
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Distance |
87.49 |
|
Distance ly |
285.39 |
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ORBITAL ELEMENTS
Period (P) | 93.61y | ± 1.24 |
Periastron (T) | 2057.69y | ± 0.6 |
Semi-major axis (a) | 0.31a | ± 0.003 |
Eccentricity (e) | 0.805 | ± 0.006 |
Inclination (i) | 49.8° | ± 1.5 |
Longitude of periastron (ω) | 271.5° | ± 4 |
Node (Ω) | 118.1° | ± 4 |
Notes | n | |
Reference | Doc2021c | |
Equinox | | |
Last observation | 2019 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
198.4 |
0.351 |
2001 |
199.5 |
0.352 |
2002 |
200.6 |
0.354 |
2003 |
201.8 |
0.355 |
2004 |
202.9 |
0.357 |
2005 |
204.0 |
0.358 |
2006 |
205.1 |
0.359 |
2007 |
206.2 |
0.360 |
2008 |
207.3 |
0.360 |
2009 |
208.4 |
0.361 |
2010 |
209.5 |
0.361 |
2011 |
210.5 |
0.361 |
2012 |
211.6 |
0.361 |
2013 |
212.7 |
0.361 |
2014 |
213.8 |
0.361 |
2015 |
214.9 |
0.361 |
2016 |
216.0 |
0.360 |
2017 |
217.1 |
0.360 |
2018 |
218.2 |
0.359 |
2019 |
219.3 |
0.358 |
2020 |
220.4 |
0.357 |
2021 |
221.5 |
0.355 |
2022 |
222.6 |
0.354 |
2023 |
223.8 |
0.352 |
2024 |
224.9 |
0.350 |
2025 |
226.1 |
0.348 |
2026 |
227.2 |
0.346 |
2027 |
228.4 |
0.344 |
2028 |
229.6 |
0.341 |
2029 |
230.9 |
0.339 |
2030 |
232.1 |
0.336 |
2031 |
233.4 |
0.332 |
2032 |
234.7 |
0.329 |
2033 |
236.0 |
0.326 |
2034 |
237.3 |
0.322 |
2035 |
238.7 |
0.318 |
2036 |
240.1 |
0.313 |
2037 |
241.6 |
0.309 |
2038 |
243.1 |
0.304 |
2039 |
244.7 |
0.298 |
2040 |
246.3 |
0.293 |
2041 |
248.0 |
0.287 |
2042 |
249.7 |
0.280 |
2043 |
251.6 |
0.273 |
2044 |
253.5 |
0.266 |
2045 |
255.6 |
0.258 |
2046 |
257.8 |
0.250 |
2047 |
260.1 |
0.241 |
2048 |
262.7 |
0.231 |
2049 |
265.5 |
0.220 |
2050 |
268.6 |
0.208 |
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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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