12386-2704 BWL 32
12h 38m 37.13s -27° 03' 34.9" P.A. 55.00 sep 0.1 mag 8.10,10.40 Sp M2.5
| Coord 2000 |
12386-2704 |
|
Discov num |
BWL 32 |
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Comp |
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Coord arcsec 2000 |
12 38 37.13 -27 03 34.9 |
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| Date first |
2012 |
|
Date last |
2021 |
|
Obs |
7 |
|
| Pa first |
286 |
|
Pa last |
55.2 |
|
P.A. Now (θ) |
55.2° |
|
| Sep first |
0.2 |
|
Sep last |
0.137 |
|
Sep. Now (ρ) |
0.137" |
|
| Mag pri |
8.10 |
|
Mag sec |
10.40 |
|
delta mag (ΔM) |
2.3 |
|
Spectral class |
M2.5 (red) |
|
| Pri motion ra |
-185 |
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Sec motion ra |
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| Pri motion dec |
-185 |
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Sec motion dec |
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| Notes |
O
K
(Orbital solution, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hydra |
|
Gaia DR2 |
3496359397652313856 |
|
ORBITAL ELEMENTS
| Period (P) | 17y | |
Periastron (T) | 2020.13y | |
Semi-major axis (a) | 0.222a | |
| Eccentricity (e) | 0.322 | |
Inclination (i) | 137.4° | |
Longitude of periastron (ω) | 81.1° | |
| Node (Ω) | 190.2° | |
Notes | | |
Reference | Tok2021f | |
| Equinox | | |
Last observation | 2021 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
207.2 |
0.208 |
| 2001 |
188.8 |
0.188 |
| 2002 |
163.4 |
0.151 |
| 2003 |
119.6 |
0.114 |
| 2004 |
64.6 |
0.127 |
| 2005 |
31.0 |
0.172 |
| 2006 |
10.9 |
0.208 |
| 2007 |
355.8 |
0.229 |
| 2008 |
342.5 |
0.236 |
| 2009 |
329.4 |
0.235 |
| 2010 |
316.0 |
0.229 |
| 2011 |
301.7 |
0.222 |
| 2012 |
286.5 |
0.216 |
| 2013 |
270.7 |
0.214 |
| 2014 |
254.8 |
0.214 |
| 2015 |
239.0 |
0.215 |
| 2016 |
223.3 |
0.215 |
| 2017 |
207.2 |
0.208 |
| 2018 |
188.8 |
0.188 |
| 2019 |
163.4 |
0.151 |
| 2020 |
119.6 |
0.114 |
| 2021 |
64.6 |
0.127 |
| 2022 |
31.0 |
0.172 |
| 2023 |
10.9 |
0.208 |
| 2024 |
355.8 |
0.229 |
| 2025 |
342.5 |
0.236 |
| 2026 |
329.4 |
0.235 |
| 2027 |
316.0 |
0.229 |
| 2028 |
301.7 |
0.222 |
| 2029 |
286.5 |
0.216 |
| 2030 |
270.7 |
0.214 |
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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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