11319-3436 ZUC 1 Aa,Ab
11h 31m 55.26s -34° 36' 27.4" P.A. 18.00 sep 0.0 mag 8.46,8.39 Sp M2Ve
Coord 2000 |
11319-3436 |
|
Discov num |
ZUC 1 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
11 31 55.26 -34 36 27.4 |
|
Date first |
2000 |
|
Date last |
2013 |
|
Obs |
17 |
|
Pa first |
26 |
|
Pa last |
18.3 |
|
P.A. Now (θ) |
33.8° |
|
Sep first |
0.1 |
|
Sep last |
0.043 |
|
Sep. Now (ρ) |
0.049" |
|
Mag pri |
8.46 |
|
Mag sec |
8.39 |
|
delta mag (ΔM) |
0.07 |
|
Spectral class |
M2Ve (red) |
|
Pri motion ra |
-082 |
|
Sec motion ra |
|
|
Pri motion dec |
-029 |
|
Sec motion dec |
|
|
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 |
|
Gaia DR2 |
5398663566249861120 |
|
ORBITAL ELEMENTS
Period (P) | 6.0296y | ± 0.0388 |
Periastron (T) | 2004.4024y | ± 0.0802 |
Semi-major axis (a) | 0.07113a | ± 0.00821 |
Eccentricity (e) | 0.81079 | ± 0.0491 |
Inclination (i) | 96.981° | ± 1.367 |
Longitude of periastron (ω) | 255.72° | ± 2.847 |
Node (Ω) | 37.887° | ± 1.022 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2013 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
26.3 |
0.057 |
2001 |
17.9 |
0.043 |
2002 |
355.7 |
0.022 |
2003 |
268.4 |
0.016 |
2004 |
226.7 |
0.030 |
2005 |
33.1 |
0.052 |
2006 |
26.5 |
0.057 |
2007 |
18.2 |
0.043 |
2008 |
356.9 |
0.023 |
2009 |
270.9 |
0.016 |
2010 |
227.4 |
0.030 |
2011 |
33.3 |
0.051 |
2012 |
26.7 |
0.058 |
2013 |
18.5 |
0.044 |
2014 |
358.1 |
0.024 |
2015 |
273.6 |
0.015 |
2016 |
228.1 |
0.030 |
2017 |
33.6 |
0.050 |
2018 |
26.9 |
0.058 |
2019 |
18.9 |
0.045 |
2020 |
359.2 |
0.024 |
2021 |
276.4 |
0.015 |
2022 |
228.8 |
0.030 |
2023 |
33.8 |
0.049 |
2024 |
27.1 |
0.058 |
2025 |
19.2 |
0.045 |
2026 |
0.2 |
0.025 |
2027 |
279.3 |
0.015 |
2028 |
229.5 |
0.030 |
2029 |
34.1 |
0.048 |
2030 |
27.3 |
0.058 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|