13571-2731 I 234 (HD 121632)

 
 
13h 57m 06.59s -27° 31' 25.8" P.A. 215.00 sep 0.6 mag 8.61,9.67 Sp G8/K0V dist. 140.06 pc (456.88 l.y.)
 
 
Coord 2000 13571-2731 Discov num I   234 Comp Coord arcsec 2000 13 57 06.59 -27 31 25.8
Date first 1897 Date last 2014 Obs 27
Pa first 315 Pa last 214.9 P.A. Now (θ) 214.9°
Sep first 0.8 Sep last 0.575 Sep. Now (ρ) 0.575"
Mag pri 8.61 Mag sec 9.67 delta mag (ΔM) 1.06 Spectral class G8/K0V (yellow)
Pri motion ra -154 Sec motion ra -154
Pri motion dec -062 Sec motion dec -062
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 121632 Constellation Hydra SAO 182111 HIP 68148
Tycho2 6724-00569-1 Gaia DR2 6177381028669665920 HD 121632 ADS 9064
CD CD-2610004 CP CP-26 5113 Distance 140.06 Distance ly 456.88
 
 
ORBITAL ELEMENTS
 
 
Period (P)200.72y± 17.44 Periastron (T)2057.91y± 10.04 Semi-major axis (a)0.773a± 0.043
Eccentricity (e)0.725± 0.023 Inclination (i)117.3°± 1.3 Longitude of periastron (ω)83.9°± 1.1
Node (Ω)165.9°± 8.6 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 228.8 0.582
2001 227.8 0.582
2002 226.8 0.582
2003 225.8 0.581
2004 224.8 0.581
2005 223.8 0.581
2006 222.8 0.580
2007 221.8 0.580
2008 220.8 0.580
2009 219.8 0.579
2010 218.7 0.579
2011 217.7 0.578
2012 216.7 0.578
2013 215.7 0.577
2014 214.7 0.577
2015 213.7 0.576
2016 212.7 0.575
2017 211.6 0.574
2018 210.6 0.573
2019 209.6 0.572
2020 208.5 0.571
2021 207.5 0.570
2022 206.4 0.569
2023 205.4 0.567
2024 204.3 0.565
2025 203.3 0.563
2026 202.2 0.561
2027 201.1 0.559
2028 200.0 0.557
2029 198.9 0.554
2030 197.8 0.551


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



 
 


wds13571-2731a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic