14587-2739 BU 239 (59 Hya)
14h 58m 39.26s -27° 39' 26.3" P.A. 16.00 sep 0.5 mag 6.17,6.79 Sp A8III dist. 113.12 pc (369 l.y.)
Coord 2000 |
14587-2739 |
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Discov num |
BU 239 |
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Comp |
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Coord arcsec 2000 |
14 58 39.26 -27 39 26.3 |
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Date first |
1874 |
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Date last |
2019 |
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Obs |
82 |
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Pa first |
304 |
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Pa last |
16.2 |
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P.A. Now (θ) |
16.2° |
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Sep first |
0.8 |
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Sep last |
0.467 |
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Sep. Now (ρ) |
0.467" |
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Mag pri |
6.17 |
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Mag sec |
6.79 |
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delta mag (ΔM) |
0.62 |
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Spectral class |
A8III (white) |
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Pri motion ra |
-044 |
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Sec motion ra |
-044 |
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Pri motion dec |
-011 |
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Sec motion dec |
-011 |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
59 Hya |
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Constellation |
Hydra |
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SAO |
183058 |
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HIP |
73284 |
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Tycho2 |
6756-00461-1 |
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HD |
132219 |
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HR |
5577 |
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GC |
20140 |
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ADS |
9453 |
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CD |
CD-2710148 |
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Flamsteed |
59 Hydrae |
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Flamsteed name |
59 Hya |
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Distance |
113.12 |
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Distance ly |
369 |
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ORBITAL ELEMENTS
Period (P) | 429.19y | |
Periastron (T) | 2217.25y | |
Semi-major axis (a) | 0.836a | |
Eccentricity (e) | 0.337 | |
Inclination (i) | 66.9° | |
Longitude of periastron (ω) | 75.5° | |
Node (Ω) | 126.6° | |
Notes | n | |
Reference | Lin1998a | |
Equinox | 2000 | |
Last observation | 1998 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
1.0 |
0.519 |
2001 |
1.8 |
0.515 |
2002 |
2.7 |
0.511 |
2003 |
3.5 |
0.507 |
2004 |
4.3 |
0.503 |
2005 |
5.2 |
0.500 |
2006 |
6.1 |
0.496 |
2007 |
7.0 |
0.492 |
2008 |
7.9 |
0.489 |
2009 |
8.8 |
0.485 |
2010 |
9.7 |
0.482 |
2011 |
10.6 |
0.479 |
2012 |
11.6 |
0.475 |
2013 |
12.6 |
0.472 |
2014 |
13.5 |
0.469 |
2015 |
14.5 |
0.466 |
2016 |
15.5 |
0.463 |
2017 |
16.5 |
0.461 |
2018 |
17.6 |
0.458 |
2019 |
18.6 |
0.456 |
2020 |
19.7 |
0.453 |
2021 |
20.7 |
0.451 |
2022 |
21.8 |
0.449 |
2023 |
22.9 |
0.447 |
2024 |
24.0 |
0.445 |
2025 |
25.1 |
0.443 |
2026 |
26.2 |
0.441 |
2027 |
27.3 |
0.439 |
2028 |
28.4 |
0.438 |
2029 |
29.5 |
0.437 |
2030 |
30.7 |
0.436 |
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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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