01312-0702 HDS 198 (HD 9278)

 
 
01h 31m 10.70s -07 01' 58.0" P.A. 114.00 sep 0.0 mag 8.19,9.79 Sp K0 dist. 105.26 pc (343.36 l.y.)
 
 
Coord 2000 01312-0702 Discov num HDS 198 Comp Coord arcsec 2000 01 31 10.70 -07 01 58.0
Date first 1991 Date last 2021 Obs 13
Pa first 190 Pa last 113.9 P.A. Now (θ) 113.9°
Sep first 0.2 Sep last 0.049 Sep. Now (ρ) 0.049"
Mag pri 8.19 Mag sec 9.79 delta mag (ΔM) 1.6 Spectral class K0 (yellow-orange)
Pri motion ra -001 Sec motion ra
Pri motion dec -015 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 9278 Constellation Cetus SAO 129345 HIP 7075
Tycho2 4687-00409-1 Gaia DR2 2477926238342739968 HD 9278 BD BD-07 246
Distance 105.26 Distance ly 343.36
 
 
ORBITAL ELEMENTS
 
 
Period (P)51.6y Periastron (T)2028.8y Semi-major axis (a)0.176a
Eccentricity (e)0.7 Inclination (i)107.3° Longitude of periastron (ω)42.4°
Node (Ω)18.5° Notes ReferenceTok2018i
Equinox2000 Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 185.8 0.242
2001 185.0 0.238
2002 184.2 0.234
2003 183.3 0.229
2004 182.4 0.223
2005 181.5 0.217
2006 180.5 0.210
2007 179.4 0.203
2008 178.2 0.195
2009 177.0 0.186
2010 175.6 0.177
2011 174.0 0.167
2012 172.3 0.157
2013 170.3 0.147
2014 168.0 0.136
2015 165.3 0.124
2016 162.0 0.113
2017 157.9 0.101
2018 152.8 0.089
2019 146.2 0.077
2020 137.3 0.067
2021 125.2 0.057
2022 109.2 0.051
2023 90.2 0.048
2024 70.9 0.050
2025 54.3 0.055
2026 40.9 0.062
2027 29.7 0.065
2028 18.1 0.059
2029 356.7 0.034
2030 258.5 0.022


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



 
 


wds01312-0702a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic