01243-0655 BU 1163 (HD 8556)

 
 
01h 24m 20.48s -06 54' 52.8" P.A. 235.00 sep 0.1 mag 6.59,6.98 Sp F3V dist. 46.64 pc (152.14 l.y.)
 
 
Coord 2000 01243-0655 Discov num BU 1163 Comp Coord arcsec 2000 01 24 20.48 -06 54 52.8
Date first 1890 Date last 2021 Obs 195
Pa first 192 Pa last 234.9 P.A. Now (θ) 224.5°
Sep first 0.2 Sep last 0.086 Sep. Now (ρ) 0.194"
Mag pri 6.59 Mag sec 6.98 delta mag (ΔM) 0.39 Spectral class F3V (yellow-white)
Pri motion ra +031 Sec motion ra
Pri motion dec +003 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 8556 Constellation Cetus SAO 129277 HIP 6564
Tycho2 4684-02325-1 Gaia DR2 2478536467295616000 HD 8556 HR 404
GC 1697 ADS 1123 BD BD-07 223 Distance 46.64
Distance ly 152.14
 
 
ORBITAL ELEMENTS
 
 
Period (P)16.11y Periastron (T)1988.84y Semi-major axis (a)0.199a
Eccentricity (e)0.93 Inclination (i)117° Longitude of periastron (ω)348°
Node (Ω)29° Notesn ReferenceSod1999
Equinox2000 Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 211.1 0.346
2001 209.8 0.316
2002 208.1 0.275
2003 205.7 0.219
2004 200.9 0.136
2005 357.1 0.014
2006 229.8 0.124
2007 224.0 0.202
2008 221.3 0.259
2009 219.4 0.302
2010 217.9 0.334
2011 216.7 0.357
2012 215.6 0.371
2013 214.5 0.377
2014 213.5 0.376
2015 212.4 0.366
2016 211.3 0.348
2017 209.9 0.320
2018 208.3 0.281
2019 206.0 0.226
2020 201.7 0.147
2021 109.7 0.010
2022 231.0 0.113
2023 224.5 0.194
2024 221.5 0.253
2025 219.6 0.298
2026 218.1 0.331
2027 216.8 0.355
2028 215.7 0.370
2029 214.6 0.377
2030 213.6 0.376


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



 
 


wds01243-0655a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic