08277-0425 A 550 (HD 71499)

 
 
08h 27m 40.81s -04° 24' 53.2" P.A. 126.00 sep 0.1 mag 7.47,7.91 Sp F2IV dist. 122.1 pc (398.29 l.y.)
 
 
Coord 2000 08277-0425 Discov num A   550 Comp Coord arcsec 2000 08 27 40.81 -04 24 53.2
Date first 1903 Date last 2021 Obs 68
Pa first 190 Pa last 126.2 P.A. Now (θ) 107.8°
Sep first 0.2 Sep last 0.066 Sep. Now (ρ) 0.044"
Mag pri 7.47 Mag sec 7.91 delta mag (ΔM) 0.44 Spectral class F2IV (yellow-white)
Pri motion ra +028 Sec motion ra
Pri motion dec -046 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 71499 Constellation Hydra SAO 135938 HIP 41489
Tycho2 4857-02153-1 Gaia DR2 3066424100350816640 HD 71499 GC 11566
ADS 6825 BD BD-03 2356 Distance 122.1 Distance ly 398.29
 
 
ORBITAL ELEMENTS
 
 
Period (P)21.23y± 0.23 Periastron (T)1981.3y± 0.29 Semi-major axis (a)0.099a± 0.003
Eccentricity (e)0.866± 0.191 Inclination (i)149.6°± 12.4 Longitude of periastron (ω)82.1°± 29.4
Node (Ω)71.6°± 24.7 Notesn ReferenceCve2006e
Equinox2000 Last observation1996 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 137.7 0.090
2001 126.1 0.067
2002 97.0 0.035
2003 244.0 0.033
2004 214.0 0.068
2005 202.9 0.093
2006 196.0 0.111
2007 190.9 0.125
2008 186.7 0.137
2009 183.1 0.145
2010 179.8 0.152
2011 176.8 0.156
2012 174.0 0.159
2013 171.1 0.160
2014 168.3 0.159
2015 165.4 0.156
2016 162.4 0.152
2017 159.2 0.145
2018 155.6 0.137
2019 151.4 0.126
2020 146.3 0.112
2021 139.6 0.095
2022 129.5 0.073
2023 107.8 0.044
2024 267.5 0.021
2025 217.9 0.062
2026 204.9 0.088
2027 197.4 0.107
2028 191.9 0.122
2029 187.6 0.134
2030 183.9 0.144


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



 
 


wds08277-0425b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic