08539+1958 COU 773 (HD 75974)

08h 53m 55.35s +19° 58' 01.7" P.A. 74.00 sep 0.1 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 2014 Obs 44
Pa first 30 Pa last 74.2 P.A. Now (θ) 74.2°
Sep first 0.2 Sep last 0.079 Sep. Now (ρ) 0.079"
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

Name HD 75974 Constellation Cancer SAO 80491 HIP 43683
Tycho2 1397-00178-1 Gaia DR2 660794844638679808 HD 75974 GC 12284
BD BD+20 2232 Distance 164.74 Distance ly 537.38




ORBITAL ELEMENTS

Period (P)165.3y± 7.7 Periastron (T)2019.5y± 2.1 Semi-major axis (a)0.232a± 0.007
Eccentricity (e)0.213± 0.008 Inclination (i)76.5°± 0.2 Longitude of periastron (ω)86.6°± 7.2
Node (Ω)45.2°± 0.1 Notes ReferenceKsr2021
Equinox Last observation2006 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 51.2 0.185
2001 52.0 0.180
2002 52.8 0.174
2003 53.7 0.167
2004 54.7 0.161
2005 55.8 0.154
2006 57.0 0.146
2007 58.3 0.139
2008 59.8 0.131
2009 61.5 0.123
2010 63.4 0.114
2011 65.6 0.106
2012 68.1 0.097
2013 71.2 0.089
2014 75.0 0.080
2015 79.6 0.072
2016 85.5 0.064
2017 92.9 0.056
2018 102.4 0.050
2019 114.2 0.045
2020 128.0 0.043
2021 142.7 0.043
2022 156.4 0.046
2023 168.1 0.050
2024 177.5 0.057
2025 184.9 0.064
2026 190.7 0.072
2027 195.3 0.081
2028 199.0 0.089
2029 202.1 0.098
2030 204.6 0.106


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



 
 


wds08539%2B1958b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic