09477+2036 COU 284

 
 
09H 47M 42.79S +20 36' 17.2" P.A. 306.6 SEP 0.05 MAG 8.15,8.31 SP F0 DIST. 87.03 PC (283.89 L.Y.)
 
 
Coord 2000
09477+2036
Discov num
COU 284
Comp
Coord arcsec 2000
09 47 42.79 +20 36 17.2
Date first
1968
Date last
1997
Obs
37
Pa first
72
Pa last
46
P.A. Now (θ)
306.6°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.05"
Mag pri
8.15
Mag sec
8.31
delta mag (ΔM)
0.16
Spectral class
F0 (yellow-white)
Pri motion ra
+077
Sec motion ra
Pri motion dec
-010
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Leo
SAO
81017
HIP
48051
Tycho2
1417-00337-1
HD
84739
BD
BD+21 2108
Distance
87.03
Distance ly
283.89
last precise pa
46.2
last precise sep
0.12
 
 
ORBITAL ELEMENTS
 
 
Period (P)156y Periastron (T)2020.07y Semi-major axis (a)0.125a
Eccentricity (e)0.64 Inclination (i)150° Longitude of periastron (ω)178.8°
Node (Ω)90° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.105 39.1
2001 0.101 36.8
2002 0.097 34.4
2003 0.093 31.7
2004 0.089 28.9
2005 0.085 25.7
2006 0.082 22.3
2007 0.078 18.5
2008 0.074 14.3
2009 0.070 9.6
2010 0.066 4.4
2011 0.062 358.5
2012 0.059 351.9
2013 0.056 344.6
2014 0.053 336.3
2015 0.050 327.2
2016 0.048 317.3
2017 0.047 306.6
2018 0.046 295.3
2019 0.045 283.7
2020 0.045 271.9
2021 0.045 260.1
2022 0.046 248.4
2023 0.047 237.2
2024 0.048 226.6
2025 0.050 216.6
2026 0.053 207.5
2027 0.055 199.2
2028 0.058 191.8
2029 0.062 185.1
2030 0.065 179.2

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