13286-2306 HDS 1887
13h 28m 32.97s -23° 05' 54.4" P.A. 321.00 sep 0.2 mag 12.47,12.97 dist. 49.63 pc (161.89 l.y.)
| Coord 2000 |
13286-2306 |
|
Discov num |
HDS1887 |
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Comp |
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Coord arcsec 2000 |
13 28 32.97 -23 05 54.4 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
9 |
|
| Pa first |
181 |
|
Pa last |
321 |
|
P.A. Now (θ) |
321° |
|
| Sep first |
0.3 |
|
Sep last |
0.212 |
|
Sep. Now (ρ) |
0.212" |
|
| Mag pri |
12.47 |
|
Mag sec |
12.97 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
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| Pri motion ra |
+237 |
|
Sec motion ra |
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| Pri motion dec |
-126 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hydra |
|
HIP |
65740 |
|
Gaia DR2 |
6195051413183588480 |
|
Distance |
49.63 |
|
| Distance ly |
161.89 |
|
ORBITAL ELEMENTS
| Period (P) | 46.993y | |
Periastron (T) | 2013.099y | |
Semi-major axis (a) | 0.3a | |
| Eccentricity (e) | 0 | |
Inclination (i) | 126.5° | |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 10.3° | |
Notes | n | |
Reference | Tok2018e | |
| Equinox | 2000 | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
117.4 |
0.184 |
| 2001 |
104.8 |
0.179 |
| 2002 |
92.0 |
0.180 |
| 2003 |
79.7 |
0.186 |
| 2004 |
68.4 |
0.197 |
| 2005 |
58.6 |
0.211 |
| 2006 |
50.0 |
0.227 |
| 2007 |
42.6 |
0.243 |
| 2008 |
36.1 |
0.259 |
| 2009 |
30.3 |
0.272 |
| 2010 |
25.0 |
0.284 |
| 2011 |
20.0 |
0.292 |
| 2012 |
15.3 |
0.298 |
| 2013 |
10.8 |
0.300 |
| 2014 |
6.2 |
0.299 |
| 2015 |
1.5 |
0.294 |
| 2016 |
356.6 |
0.286 |
| 2017 |
351.4 |
0.275 |
| 2018 |
345.7 |
0.262 |
| 2019 |
339.4 |
0.246 |
| 2020 |
332.1 |
0.230 |
| 2021 |
323.8 |
0.214 |
| 2022 |
314.2 |
0.200 |
| 2023 |
303.3 |
0.188 |
| 2024 |
291.1 |
0.181 |
| 2025 |
278.3 |
0.179 |
| 2026 |
265.7 |
0.182 |
| 2027 |
253.8 |
0.191 |
| 2028 |
243.3 |
0.204 |
| 2029 |
234.1 |
0.219 |
| 2030 |
226.1 |
0.235 |
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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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