03087-4413 HDS 398 (HD 19693)

 
 
03h 08m 39.51s -44° 13' 17.8" P.A. 89.00 sep 0.1 mag 9.44,9.70 Sp F7V dist. 155.28 pc (506.52 l.y.)
 
 
Coord 2000 03087-4413 Discov num HDS 398 Comp Coord arcsec 2000 03 08 39.51 -44 13 17.8
Date first 1991 Date last 2020 Obs 7
Pa first 253 Pa last 88.7 P.A. Now (θ) 88.7°
Sep first 0.1 Sep last 0.107 Sep. Now (ρ) 0.107"
Mag pri 9.44 Mag sec 9.70 delta mag (ΔM) 0.26 Spectral class F7V (yellow-white)
Pri motion ra +020 Sec motion ra
Pri motion dec +009 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 19693 Constellation Eridanus SAO 216181 HIP 14608
Tycho2 7567-00839-1 Gaia DR2 4754581401431666816 HD 19693 CD CD-44 994
CP CP-44 333 Distance 155.28 Distance ly 506.52
 
 
ORBITAL ELEMENTS
 
 
Period (P)170y Periastron (T)2003.37y Semi-major axis (a)0.235a
Eccentricity (e)0.462 Inclination (i)109.7° Longitude of periastron (ω)39.8°
Node (Ω)243.1° Notes ReferenceTok2020g
Equinox2000 Last observation2018 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 236.8 0.124
2001 234.4 0.118
2002 231.7 0.111
2003 228.6 0.104
2004 225.1 0.096
2005 221.0 0.088
2006 215.9 0.079
2007 209.7 0.071
2008 201.8 0.063
2009 191.8 0.056
2010 179.4 0.051
2011 164.9 0.048
2012 149.8 0.048
2013 135.7 0.052
2014 123.8 0.057
2015 114.3 0.065
2016 106.9 0.073
2017 101.1 0.082
2018 96.4 0.092
2019 92.7 0.101
2020 89.6 0.111
2021 86.9 0.120
2022 84.7 0.130
2023 82.7 0.139
2024 81.0 0.148
2025 79.5 0.156
2026 78.2 0.165
2027 76.9 0.173
2028 75.8 0.181
2029 74.8 0.189
2030 73.9 0.196


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


 
  


wds03087-4413a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic