09477+2036 COU 284

 
 
09h 47m 42.79s +20 36' 17.2" P.A. 167.20 sep 0.1 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)
167.2°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.13"
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
 
 
Precise pa
46.2
Precise sep
0.12
Constellation
Leo
SAO
81017
HIP
48051
Tycho2
1417-00337-1
Gaia DR2
639683671628307456
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)261.81y Periastron (T)2008.85y Semi-major axis (a)0.27a
Eccentricity (e)0.891 Inclination (i)122.2° Longitude of periastron (ω)83.9°
Node (Ω)11.3° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.100 39.0
2001 0.095 36.4
2002 0.089 33.6
2003 0.083 30.3
2004 0.075 26.4
2005 0.067 21.5
2006 0.056 15.1
2007 0.043 5.3
2008 0.027 345.0
2009 0.016 278.0
2010 0.029 218.2
2011 0.046 200.5
2012 0.060 191.9
2013 0.072 186.3
2014 0.082 182.3
2015 0.091 179.0
2016 0.099 176.4
2017 0.107 174.1
2018 0.113 172.1
2019 0.119 170.3
2020 0.125 168.7
2021 0.131 167.2
2022 0.136 165.8
2023 0.140 164.5
2024 0.145 163.3
2025 0.149 162.2
2026 0.154 161.2
2027 0.158 160.2
2028 0.161 159.2
2029 0.165 158.3
2030 0.169 157.4


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



 
 


wds09477%2B2036b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
09477+2036 COU 284 1997 37 46 0.1 8.15 8.31 F0 O 094742.79+203617.2

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