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 |
|
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 |
|
Obs |
75 |
|
| Pa first |
199 |
|
Pa last |
220.4 |
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P.A. Now (θ) |
223.8° |
|
| Sep first |
0.3 |
|
Sep last |
0.36 |
|
Sep. Now (ρ) |
0.352" |
|
| Mag pri |
8.11 |
|
Mag sec |
9.17 |
|
delta mag (ΔM) |
1.06 |
|
Spectral class |
F5 (yellow-white) |
|
| Pri motion ra |
+028 |
|
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 |
|
SAO |
129063 |
|
HIP |
4619 |
|
| Tycho2 |
4674-00743-1 |
|
HD |
5781 |
|
ADS |
819 |
|
BD |
BD-01 124 |
|
| Distance |
87.49 |
|
Distance ly |
285.39 |
|
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 |
|
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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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