10214-2616 HDS 1491 (HD 89817)

 
 
10h 21m 24.30s -26° 15' 43.8" P.A. 310.00 sep 0.1 mag 8.58,10.13 Sp F7/F8V dist. 86.73 pc (282.91 l.y.)
 
 
Coord 2000 10214-2616 Discov num HDS1491 Comp Coord arcsec 2000 10 21 24.30 -26 15 43.8
Date first 1991 Date last 2021 Obs 15
Pa first 65 Pa last 309.8 P.A. Now (θ) 255.1°
Sep first 0.2 Sep last 0.095 Sep. Now (ρ) 0.081"
Mag pri 8.58 Mag sec 10.13 delta mag (ΔM) 1.55 Spectral class F7/F8V (yellow-white)
Pri motion ra -040 Sec motion ra
Pri motion dec -016 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 89817 Constellation Hydra SAO 178720 HIP 50724
Tycho2 6627-01441-1 Gaia DR2 5472035042322559232 HD 89817 CD CD-25 7957
CP CP-25 4546 Distance 86.73 Distance ly 282.91
 
 
ORBITAL ELEMENTS
 
 
Period (P)22.1y Periastron (T)2022.75y Semi-major axis (a)0.113a
Eccentricity (e)0.287 Inclination (i)180° Longitude of periastron (ω)
Node (Ω)262.8° Notes ReferenceTok2019c
Equinox Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 282.6 0.082
2001 252.1 0.081
2002 222.8 0.085
2003 197.4 0.093
2004 176.3 0.102
2005 158.7 0.111
2006 143.9 0.120
2007 131.0 0.128
2008 119.5 0.135
2009 108.9 0.140
2010 99.0 0.143
2011 89.4 0.145
2012 80.0 0.145
2013 70.5 0.144
2014 60.7 0.141
2015 50.4 0.137
2016 39.3 0.131
2017 27.0 0.124
2018 13.1 0.115
2019 356.7 0.106
2020 337.1 0.096
2021 313.5 0.088
2022 285.6 0.082
2023 255.1 0.081
2024 225.6 0.084
2025 199.8 0.092
2026 178.2 0.101
2027 160.4 0.111
2028 145.3 0.120
2029 132.2 0.127
2030 120.6 0.134


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



 
 


wds10214-2616a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic