00093+7943 STF 2 (HD 431)

 
 
00h 09m 20.18s +79° 42' 52.4" P.A. 15.00 sep 0.9 mag 6.68,6.89 Sp A4IV dist. 105.49 pc (344.11 l.y.)
 
 
Coord 2000 00093+7943 Discov num STF   2 Comp Coord arcsec 2000 00 09 20.18 +79 42 52.4
Date first 1828 Date last 2019 Obs 213
Pa first 343 Pa last 14.6 P.A. Now (θ) 13.9°
Sep first 0.8 Sep last 0.94 Sep. Now (ρ) 0.959"
Mag pri 6.68 Mag sec 6.89 delta mag (ΔM) 0.21 Spectral class A4IV (white)
Pri motion ra +106 Sec motion ra +106
Pri motion dec -033 Sec motion dec -033
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 431 Constellation Cepheus SAO 4048 HIP 760
Tycho2 4500-01334-1 Gaia DR2 565004017238715264 HD 431 HR 20
GC 149 ADS 102 BD BD+78 1 Distance 105.49
Distance ly 344.11
 
 
ORBITAL ELEMENTS
 
 
Period (P)540y Periastron (T)1887.5y Semi-major axis (a)0.995a
Eccentricity (e)0.715 Inclination (i)110.1° Longitude of periastron (ω)333.7°
Node (Ω)171.2° Notesn ReferenceHei1997
Equinox2000 Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 18.7 0.788
2001 18.5 0.796
2002 18.2 0.804
2003 18.0 0.812
2004 17.8 0.819
2005 17.5 0.827
2006 17.3 0.835
2007 17.1 0.842
2008 16.9 0.850
2009 16.6 0.857
2010 16.4 0.865
2011 16.2 0.872
2012 16.0 0.880
2013 15.8 0.887
2014 15.6 0.895
2015 15.4 0.902
2016 15.2 0.909
2017 15.0 0.916
2018 14.8 0.924
2019 14.7 0.931
2020 14.5 0.938
2021 14.3 0.945
2022 14.1 0.952
2023 13.9 0.959
2024 13.8 0.966
2025 13.6 0.973
2026 13.4 0.980
2027 13.3 0.987
2028 13.1 0.993
2029 13.0 1.000
2030 12.8 1.007


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


 
  


wds00093%2B7943a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic