02544-2007 HDS 371 (HD 18165)

 
 
02h 54m 24.33s -20° 07' 01.6" P.A. 347.00 sep 0.1 mag 9.23,11.59 Sp G6V dist. 87.64 pc (285.88 l.y.)
 
 
Coord 2000 02544-2007 Discov num HDS 371 Comp Coord arcsec 2000 02 54 24.33 -20 07 01.6
Date first 1991 Date last 2021 Obs 9
Pa first 116 Pa last 346.8 P.A. Now (θ) 346.8°
Sep first 0.4 Sep last 0.144 Sep. Now (ρ) 0.144"
Mag pri 9.23 Mag sec 11.59 delta mag (ΔM) 2.36 Spectral class G6V (yellow)
Pri motion ra +216 Sec motion ra
Pri motion dec +043 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 18165 Constellation Eridanus SAO 168133 HIP 13542
Tycho2 5870-00179-1 HD 18165 BD BD-20 540 Distance 87.64
Distance ly 285.88
 
 
ORBITAL ELEMENTS
 
 
Period (P)132y Periastron (T)2022.3y Semi-major axis (a)0.35a
Eccentricity (e)0.303 Inclination (i)120° Longitude of periastron (ω)118.4°
Node (Ω)116.3° Notes ReferenceTok2018i
Equinox2000 Last observation2018 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 104.4 0.309
2001 102.7 0.298
2002 100.9 0.288
2003 98.9 0.277
2004 96.7 0.265
2005 94.3 0.253
2006 91.7 0.240
2007 88.8 0.227
2008 85.5 0.214
2009 81.8 0.201
2010 77.5 0.187
2011 72.7 0.174
2012 67.0 0.162
2013 60.5 0.151
2014 53.0 0.141
2015 44.5 0.133
2016 35.2 0.128
2017 25.2 0.125
2018 15.1 0.126
2019 5.3 0.130
2020 356.2 0.136
2021 348.1 0.145
2022 341.0 0.155
2023 334.8 0.166
2024 329.4 0.178
2025 324.7 0.190
2026 320.5 0.202
2027 316.8 0.213
2028 313.5 0.224
2029 310.5 0.234
2030 307.7 0.244


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



 
 


wds02544-2007a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic