13169-3436 I 1567 (HD 115311)
13h 16m 53.63s -34° 35' 54.2" P.A. 84.00 sep 0.3 mag 8.55,9.55 Sp G5V dist. 43.14 pc (140.72 l.y.)
| Coord 2000 |
13169-3436 |
|
Discov num |
I 1567 |
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Comp |
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Coord arcsec 2000 |
13 16 53.63 -34 35 54.2 |
|
| Date first |
1897 |
|
Date last |
2021 |
|
Obs |
52 |
|
| Pa first |
302 |
|
Pa last |
84.4 |
|
P.A. Now (θ) |
74.8° |
|
| Sep first |
0.4 |
|
Sep last |
0.259 |
|
Sep. Now (ρ) |
0.253" |
|
| Mag pri |
8.55 |
|
Mag sec |
9.55 |
|
delta mag (ΔM) |
1 |
|
Spectral class |
G5V (yellow) |
|
| Pri motion ra |
-101 |
|
Sec motion ra |
|
|
| Pri motion dec |
-008 |
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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 115311 |
|
Constellation |
Centaurus |
|
SAO |
204311 |
|
HIP |
64804 |
|
| Tycho2 |
7271-00979-1 |
|
Gaia DR2 |
6167410451071011968 |
|
HD |
115311 |
|
CD |
CD-33 8934 |
|
| CP |
CP-33 3381 |
|
Distance |
43.14 |
|
Distance ly |
140.72 |
|
ORBITAL ELEMENTS
| Period (P) | 40.88y | ± 0.18 |
Periastron (T) | 2006.4y | ± 0.01 |
Semi-major axis (a) | 0.326a | ± 0 |
| Eccentricity (e) | 0.457 | ± 0.002 |
Inclination (i) | 121.6° | ± 0.1 |
Longitude of periastron (ω) | 274° | ± 0.4 |
| Node (Ω) | 145.5° | ± 0.2 |
Notes | n | |
Reference | Tok2015c | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
334.1 |
0.297 |
| 2001 |
328.9 |
0.280 |
| 2002 |
322.8 |
0.255 |
| 2003 |
315.1 |
0.221 |
| 2004 |
304.1 |
0.178 |
| 2005 |
285.2 |
0.130 |
| 2006 |
247.9 |
0.095 |
| 2007 |
201.0 |
0.107 |
| 2008 |
173.7 |
0.152 |
| 2009 |
159.2 |
0.197 |
| 2010 |
149.8 |
0.234 |
| 2011 |
142.7 |
0.260 |
| 2012 |
136.7 |
0.278 |
| 2013 |
131.2 |
0.289 |
| 2014 |
126.1 |
0.294 |
| 2015 |
121.1 |
0.295 |
| 2016 |
116.0 |
0.293 |
| 2017 |
110.9 |
0.289 |
| 2018 |
105.6 |
0.283 |
| 2019 |
100.0 |
0.276 |
| 2020 |
94.1 |
0.270 |
| 2021 |
88.0 |
0.263 |
| 2022 |
81.5 |
0.257 |
| 2023 |
74.8 |
0.253 |
| 2024 |
67.9 |
0.250 |
| 2025 |
60.9 |
0.248 |
| 2026 |
53.8 |
0.249 |
| 2027 |
46.8 |
0.251 |
| 2028 |
40.0 |
0.255 |
| 2029 |
33.4 |
0.261 |
| 2030 |
27.1 |
0.267 |
|
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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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