11319-3436 ZUC   1Aa,Ab

 
 
11H 31M 55.26S -34 36' 27.4" P.A. 33.1 SEP 0.05 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
P.A. Now (θ)
33.1°
Sep first
0.1
Sep last
0.0
Sep. Now (ρ)
0.05"
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)
This double is physical.
 
 
11319-3436 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 11319-3436 ZUC 1 Aa,Ab 2000 2013 17 33 0.0 8.46 8.39 0.07 Y <===
Show 11319-3436 LWR 2 AB 1997 2013 18 354 1.8 7.70 12.60 4.90 Y
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hydra
Tycho2
7223-00275-1
last precise pa
18.3
last precise sep
0.043
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.024y± 0.009 Periastron (T)55328d (2010.359y)± 6 Semi-major axis (a)63.7m± 0.2
Eccentricity (e)0.755± 0.004 Inclination (i)97.5°± 0.1 Longitude of periastron (ω)253.1°± 0.2
Node (Ω)36.5°± 0.3 Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation2013
label rho theta
2000 0.057 26.1
2001 0.042 17.7
2002 0.021 353.9
2003 0.017 257.9
2004 0.030 222.0
2005 0.051 32.7
2006 0.057 26.3
2007 0.043 18.0
2008 0.021 355.0
2009 0.016 259.7
2010 0.030 222.6
2011 0.051 32.9
2012 0.057 26.4
2013 0.043 18.3
2014 0.022 356.1
2015 0.016 261.6
2016 0.030 223.1
2017 0.050 33.1
2018 0.057 26.6
2019 0.043 18.6
2020 0.022 357.2
2021 0.016 263.6
2022 0.030 223.7
2023 0.049 33.3
2024 0.058 26.7
2025 0.044 18.8
2026 0.023 358.2
2027 0.015 265.7
2028 0.030 224.2
2029 0.048 33.5
2030 0.058 26.9

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic