08539+1958 COU 773

 
 
08H 53M 55.35S +19 58' 01.7" P.A. 63 SEP 0.17 MAG 7.32,7.86 SP F8 DIST. 164.74 PC (537.38 L.Y.)
 
 
Coord 2000
08539+1958
Discov num
COU 773
Comp
Coord arcsec 2000
08 53 55.35 +19 58 01.7
Date first
1972
Date last
2007
Obs
43
Pa first
30
Pa last
62
P.A. Now (θ)
63°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.17"
Mag pri
7.32
Mag sec
7.86
delta mag (ΔM)
0.54
Spectral class
F8 (yellow-white)
Pri motion ra
-024
Sec motion ra
Pri motion dec
-009
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cancer
SAO
80491
HIP
43683
Tycho2
1397-00178-1
HD
75974
BD
BD+20 2232
Distance
164.74
Distance ly
537.38
last precise pa
62.2
last precise sep
0.165
 
 
ORBITAL ELEMENTS
 
 
Period (P)172.6y Periastron (T)1943.3y Semi-major axis (a)0.219a
Eccentricity (e)0.6 Inclination (i)71° Longitude of periastron (ω)254.6°
Node (Ω)26.4° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.206 50.6
2001 0.204 51.2
2002 0.203 51.9
2003 0.201 52.5
2004 0.199 53.2
2005 0.197 53.8
2006 0.195 54.5
2007 0.194 55.2
2008 0.192 55.9
2009 0.190 56.6
2010 0.188 57.3
2011 0.186 58.1
2012 0.183 58.9
2013 0.181 59.6
2014 0.179 60.4
2015 0.177 61.3
2016 0.175 62.1
2017 0.173 63.0
2018 0.170 63.9
2019 0.168 64.8
2020 0.166 65.7
2021 0.164 66.7
2022 0.161 67.6
2023 0.159 68.7
2024 0.157 69.7
2025 0.154 70.8
2026 0.152 71.9
2027 0.150 73.0
2028 0.148 74.2
2029 0.145 75.4
2030 0.143 76.7

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