11319-3436 LWR 2 AB
11h 31m 55.26s -34° 36' 27.4" P.A. 352.00 sep 1.8 mag 7.70,12.60 Sp M1.5+M8.5
| Coord 2000 |
11319-3436 |
|
Discov num |
LWR 2 |
|
Comp |
AB |
|
Coord arcsec 2000 |
11 31 55.26 -34 36 27.4 |
|
| Date first |
1997 |
|
Date last |
2018 |
|
Obs |
20 |
|
| Pa first |
359 |
|
Pa last |
352.3 |
|
P.A. Now (θ) |
352.3° |
|
| Sep first |
2.0 |
|
Sep last |
1.842 |
|
Sep. Now (ρ) |
1.842" |
|
| Mag pri |
7.70 |
|
Mag sec |
12.60 |
|
delta mag (ΔM) |
4.9 |
|
Spectral class |
M1.5+M8.5 (red/red) |
|
| Pri motion ra |
-082 |
|
Sec motion ra |
|
|
| Pri motion dec |
-029 |
|
Sec motion dec |
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| Notes |
N
O
K
(See Notes, Orbital solution, K-band or other infrared magnitudes) |
|
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
11319-3436 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
11 31 55 -34 36 27 |
ZUC 1 Aa,Ab |
2013 |
17 |
18 |
0.0 |
8.46 |
8.39 |
0.07 |
Y |
|
| Show |
|
|
11 31 55 -34 36 27 |
LWR 2 AB |
2018 |
20 |
352 |
1.8 |
7.70 |
12.60 |
4.90 |
Y |
<=== |
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hydra |
|
Tycho2 |
7223-00275-1 |
|
Gaia DR2 |
5398663566249861120 |
|
ORBITAL ELEMENTS
| Period (P) | 1380y | ± 59 |
Periastron (T) | 2168.31y | ± 0.51 |
Semi-major axis (a) | 2.548a | ± 0.015 |
| Eccentricity (e) | 0.24 | ± 0.12 |
Inclination (i) | 138° | ± 10 |
Longitude of periastron (ω) | 112° | ± 5 |
| Node (Ω) | 36.1° | ± 7.1 |
Notes | n | |
Reference | Koh2013 | |
| Equinox | | |
Last observation | 2013 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
359.9 |
1.942 |
| 2001 |
359.6 |
1.936 |
| 2002 |
359.3 |
1.931 |
| 2003 |
358.9 |
1.925 |
| 2004 |
358.6 |
1.919 |
| 2005 |
358.3 |
1.914 |
| 2006 |
357.9 |
1.908 |
| 2007 |
357.6 |
1.902 |
| 2008 |
357.3 |
1.897 |
| 2009 |
356.9 |
1.891 |
| 2010 |
356.6 |
1.885 |
| 2011 |
356.2 |
1.880 |
| 2012 |
355.9 |
1.874 |
| 2013 |
355.5 |
1.869 |
| 2014 |
355.2 |
1.863 |
| 2015 |
354.8 |
1.857 |
| 2016 |
354.5 |
1.852 |
| 2017 |
354.1 |
1.846 |
| 2018 |
353.8 |
1.841 |
| 2019 |
353.4 |
1.835 |
| 2020 |
353.0 |
1.829 |
| 2021 |
352.7 |
1.824 |
| 2022 |
352.3 |
1.818 |
| 2023 |
351.9 |
1.813 |
| 2024 |
351.6 |
1.807 |
| 2025 |
351.2 |
1.802 |
| 2026 |
350.8 |
1.796 |
| 2027 |
350.4 |
1.791 |
| 2028 |
350.1 |
1.785 |
| 2029 |
349.7 |
1.780 |
| 2030 |
349.3 |
1.775 |
|
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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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