11159+1318 MCA  35 (73 Leo)

 
 
11H 15M 51.90S +13 18' 27.3" P.A. 235.5 SEP 0.04 MAG 5.60,6.80 SP K3III DIST. 118.48 PC (386.48 L.Y.)
 
 
Coord 2000
11159+1318
Discov num
MCA  35
Comp
Coord arcsec 2000
11 15 51.90 +13 18 27.3
Date first
1979
Date last
2003
Obs
8
Pa first
100
Pa last
139
P.A. Now (θ)
235.5°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.04"
Mag pri
5.60
Mag sec
6.80
delta mag (ΔM)
1.2
Spectral class
K3III (yellow-orange)
Pri motion ra
-004
Sec motion ra
Pri motion dec
-012
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
73 Leo
Other name
n Leo
Constellation
Leo
SAO
99525
HIP
55016
Tycho2
0861-01283-1
HD
97907
HR
4365
GC
15487
BD
BD+14 2367
Flamsteed
73 Leonis
Flamsteed name
73 Leo
Distance
118.48
Distance ly
386.48
last precise pa
139
last precise sep
0.12
 
 
ORBITAL ELEMENTS
 
 
Period (P)8.112y± 0.0078 Periastron (T)1974.015y± 0.028 Semi-major axis (a)0.0462a± 0.0011
Eccentricity (e)0.415± 0.008 Inclination (i)49.1°± 4.1 Longitude of periastron (ω)156.5°± 1.6
Node (Ω)283.3°± 4.4 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1993
label rho theta
2000 0.032 204.0
2001 0.047 241.6
2002 0.060 261.2
2003 0.064 275.8
2004 0.057 290.8
2005 0.039 314.9
2006 0.021 36.9
2007 0.028 127.0
2008 0.031 197.6
2009 0.046 238.7
2010 0.059 259.4
2011 0.064 274.2
2012 0.059 288.9
2013 0.042 311.0
2014 0.021 22.3
2015 0.028 119.1
2016 0.030 190.6
2017 0.044 235.5
2018 0.057 257.6
2019 0.064 272.6
2020 0.060 287.1
2021 0.044 307.6
2022 0.022 8.5
2023 0.028 111.3
2024 0.029 183.2
2025 0.042 232.1
2026 0.056 255.6
2027 0.063 271.1
2028 0.061 285.3
2029 0.047 304.5
2030 0.024 356.2

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