03193-5053 RST 70 (HD 20841)

 
 
03h 19m 17.58s -50° 52' 31.1" P.A. 232.00 sep 0.1 mag 9.00,9.15 Sp F3V dist. 122.55 pc (399.76 l.y.)
 
 
Coord 2000 03193-5053 Discov num RST  70 Comp Coord arcsec 2000 03 19 17.58 -50 52 31.1
Date first 1929 Date last 2021 Obs 19
Pa first 81 Pa last 231.7 P.A. Now (θ) 237°
Sep first 0.2 Sep last 0.123 Sep. Now (ρ) 0.152"
Mag pri 9.00 Mag sec 9.15 delta mag (ΔM) 0.15 Spectral class F3V (yellow-white)
Pri motion ra -028 Sec motion ra
Pri motion dec +019 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 20841 Constellation Horologium SAO 233072 HIP 15451
Tycho2 8065-01243-1 Gaia DR2 4737105630476832128 HD 20841 GC 3997
CD CD-51 768 CP CP-51 392 Distance 122.55 Distance ly 399.76
 
 
ORBITAL ELEMENTS
 
 
Period (P)51.1y± 2.7 Periastron (T)2017.33y± 0.29 Semi-major axis (a)0.176a± 0.025
Eccentricity (e)0.74± 0.08 Inclination (i)52.8°± 7.8 Longitude of periastron (ω)67.8°± 12.9
Node (Ω)44.7°± 19.1 Notes ReferenceTok2019c
Equinox Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 300.5 0.175
2001 303.5 0.170
2002 306.7 0.165
2003 310.1 0.160
2004 313.7 0.154
2005 317.5 0.149
2006 321.7 0.143
2007 326.2 0.138
2008 331.0 0.132
2009 336.4 0.126
2010 342.2 0.120
2011 348.7 0.114
2012 355.9 0.108
2013 4.1 0.101
2014 13.6 0.092
2015 25.4 0.081
2016 41.9 0.065
2017 76.0 0.039
2018 167.1 0.035
2019 205.9 0.067
2020 219.5 0.096
2021 227.3 0.119
2022 232.7 0.137
2023 237.0 0.152
2024 240.5 0.164
2025 243.6 0.175
2026 246.4 0.184
2027 248.9 0.191
2028 251.3 0.197
2029 253.5 0.202
2030 255.6 0.207


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


 
  


wds03193-5053a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic