00121-5832 RST 4739 (HD 791)

 
 
00h 12m 05.19s -58 31' 29.3" P.A. 262.00 sep 0.2 mag 8.44,8.61 Sp G5IV/V dist. 59.38 pc (193.7 l.y.)
 
 
Coord 2000 00121-5832 Discov num RST4739 Comp Coord arcsec 2000 00 12 05.19 -58 31 29.3
Date first 1942 Date last 2020 Obs 13
Pa first 283 Pa last 261.5 P.A. Now (θ) 245.3°
Sep first 0.3 Sep last 0.236 Sep. Now (ρ) 0.198"
Mag pri 8.44 Mag sec 8.61 delta mag (ΔM) 0.17 Spectral class G5IV/V (yellow)
Pri motion ra +066 Sec motion ra
Pri motion dec -156 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 791 Constellation Tucana SAO 231967 HIP 975
Tycho2 8470-00653-1 HD 791 GC 213 CP CP-59 10
Distance 59.38 Distance ly 193.7
 
 
ORBITAL ELEMENTS
 
 
Period (P)38.23y Periastron (T)2027.97y Semi-major axis (a)0.226a
Eccentricity (e)0.551 Inclination (i)155.6° Longitude of periastron (ω)275.8°
Node (Ω)50.1° Notes ReferenceCve2020
Equinox2000 Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 349.0 0.273
2001 344.3 0.283
2002 339.9 0.292
2003 335.7 0.299
2004 331.7 0.305
2005 327.8 0.310
2006 324.1 0.314
2007 320.4 0.317
2008 316.8 0.319
2009 313.2 0.320
2010 309.6 0.319
2011 306.0 0.318
2012 302.4 0.315
2013 298.7 0.312
2014 294.9 0.307
2015 290.9 0.301
2016 286.8 0.294
2017 282.4 0.285
2018 277.8 0.275
2019 272.7 0.263
2020 267.2 0.250
2021 261.0 0.235
2022 253.8 0.218
2023 245.3 0.198
2024 234.9 0.176
2025 221.1 0.151
2026 201.8 0.125
2027 172.7 0.102
2028 132.5 0.093
2029 93.6 0.105
2030 66.2 0.128


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



 
 


wds00121-5832a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic