11159+1318 MCA 35 (73 Leo)

 
 
11h 15m 51.90s +13° 18' 27.3" P.A. 310.00 sep 0.0 mag 5.50,7.30 Sp K1III+A7V 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 2021 Obs 13
Pa first 280 Pa last 309.7 P.A. Now (θ) 309.7°
Sep first 0.1 Sep last 0.034 Sep. Now (ρ) 0.034"
Mag pri 5.50 Mag sec 7.30 delta mag (ΔM) 1.8 Spectral class K1III+A7V (yellow-orange/white)
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 Constellation Leo SAO 99525 HIP 55016
Tycho2 0861-01283-1 Gaia DR2 3965092440205592064 HD 97907 HR 4365
GC 15487 BD BD+14 2367 Flamsteed 73 Leonis Flamsteed name 73 Leo
Distance 118.48 Distance ly 386.48
 
 
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 Notesn ReferenceMsn1997b
Equinox2000 Last observation1993 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 204.0 0.032
2001 241.6 0.047
2002 261.2 0.060
2003 275.8 0.064
2004 290.8 0.057
2005 314.9 0.039
2006 36.9 0.021
2007 127.0 0.028
2008 197.6 0.031
2009 238.7 0.046
2010 259.4 0.059
2011 274.2 0.064
2012 288.9 0.059
2013 311.0 0.042
2014 22.3 0.021
2015 119.1 0.028
2016 190.6 0.030
2017 235.5 0.044
2018 257.6 0.057
2019 272.6 0.064
2020 287.1 0.060
2021 307.6 0.044
2022 8.5 0.022
2023 111.3 0.028
2024 183.2 0.029
2025 232.1 0.042
2026 255.6 0.056
2027 271.1 0.063
2028 285.3 0.061
2029 304.5 0.047
2030 356.2 0.024


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



 
 


wds11159%2B1318b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic