13190-2536 HDS 1866 (HD 115683)
13h 18m 58.38s -25° 35' 44.0" P.A. 330.00 sep 0.2 mag 8.52,9.90 Sp F8V dist. 94.79 pc (309.2 l.y.)
Coord 2000 |
13190-2536 |
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Discov num |
HDS1866 |
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Comp |
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Coord arcsec 2000 |
13 18 58.38 -25 35 44.0 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
7 |
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Pa first |
21 |
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Pa last |
329.7 |
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P.A. Now (θ) |
312.1° |
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Sep first |
0.2 |
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Sep last |
0.161 |
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Sep. Now (ρ) |
0.145" |
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Mag pri |
8.52 |
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Mag sec |
9.90 |
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delta mag (ΔM) |
1.38 |
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Spectral class |
F8V (yellow-white) |
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Pri motion ra |
-054 |
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Sec motion ra |
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Pri motion dec |
-036 |
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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
Name |
HD 115683 |
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Constellation |
Hydra |
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SAO |
181546 |
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HIP |
64970 |
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Tycho2 |
6704-01445-1 |
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Gaia DR2 |
6192886440428595456 |
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HD |
115683 |
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CD |
CD-2410838 |
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CP |
CP-24 5038 |
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Distance |
94.79 |
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Distance ly |
309.2 |
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ORBITAL ELEMENTS
Period (P) | 22.72y | ± 0.37 |
Periastron (T) | 2008.29y | ± 0.16 |
Semi-major axis (a) | 0.1435a | ± 0.0032 |
Eccentricity (e) | 0.397 | ± 0.024 |
Inclination (i) | 137.8° | ± 2.6 |
Longitude of periastron (ω) | 225.8° | ± 5.4 |
Node (Ω) | 18.3° | ± 5 |
Notes | | |
Reference | Tok2020e | |
Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
315.1 |
0.148 |
2001 |
304.1 |
0.137 |
2002 |
291.3 |
0.127 |
2003 |
276.6 |
0.119 |
2004 |
260.0 |
0.113 |
2005 |
241.8 |
0.108 |
2006 |
222.2 |
0.104 |
2007 |
200.1 |
0.096 |
2008 |
171.5 |
0.081 |
2009 |
130.0 |
0.068 |
2010 |
85.9 |
0.078 |
2011 |
57.7 |
0.102 |
2012 |
40.7 |
0.127 |
2013 |
29.0 |
0.149 |
2014 |
20.0 |
0.164 |
2015 |
12.3 |
0.175 |
2016 |
5.4 |
0.182 |
2017 |
358.8 |
0.184 |
2018 |
352.3 |
0.183 |
2019 |
345.6 |
0.180 |
2020 |
338.4 |
0.173 |
2021 |
330.7 |
0.165 |
2022 |
322.0 |
0.155 |
2023 |
312.1 |
0.145 |
2024 |
300.7 |
0.134 |
2025 |
287.4 |
0.125 |
2026 |
272.1 |
0.117 |
2027 |
255.0 |
0.111 |
2028 |
236.5 |
0.107 |
2029 |
216.3 |
0.102 |
2030 |
193.0 |
0.092 |
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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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