02517-5234 HU 1562 (HD 18025)

 
 
02h 51m 42.71s -52° 33' 34.2" P.A. 80.00 sep 0.1 mag 8.79,9.71 Sp G3V dist. 78.68 pc (256.65 l.y.)
 
 
Coord 2000 02517-5234 Discov num HU 1562 Comp Coord arcsec 2000 02 51 42.71 -52 33 34.2
Date first 1914 Date last 2021 Obs 27
Pa first 59 Pa last 79.6 P.A. Now (θ) 75.9°
Sep first 0.5 Sep last 0.098 Sep. Now (ρ) 0.139"
Mag pri 8.79 Mag sec 9.71 delta mag (ΔM) 0.92 Spectral class G3V (yellow)
Pri motion ra -015 Sec motion ra -015
Pri motion dec -112 Sec motion dec -112
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 18025 Constellation Horologium SAO 232919 HIP 13341
Tycho2 8491-01096-1 Gaia DR2 4741933792193863040 HD 18025 CP CP-53 489
Distance 78.68 Distance ly 256.65
 
 
ORBITAL ELEMENTS
 
 
Period (P)67.62y± 1.07 Periastron (T)2019.94y± 0.17 Semi-major axis (a)0.2588a± 0.0036
Eccentricity (e)0.95± 0.022 Inclination (i)128.9°± 11.5 Longitude of periastron (ω)168.9°± 6.8
Node (Ω)49.1°± 3.5 Notes ReferenceTok2020e
Equinox Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 52.0 0.448
2001 51.6 0.440
2002 51.2 0.430
2003 50.8 0.420
2004 50.4 0.409
2005 50.0 0.398
2006 49.6 0.385
2007 49.1 0.371
2008 48.5 0.357
2009 48.0 0.341
2010 47.3 0.324
2011 46.6 0.305
2012 45.8 0.285
2013 44.9 0.264
2014 43.8 0.240
2015 42.4 0.213
2016 40.7 0.184
2017 38.1 0.151
2018 34.0 0.111
2019 24.2 0.062
2020 212.0 0.013
2021 92.2 0.059
2022 80.8 0.102
2023 75.9 0.139
2024 72.9 0.170
2025 70.9 0.199
2026 69.3 0.224
2027 68.1 0.248
2028 67.0 0.270
2029 66.1 0.290
2030 65.3 0.308


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



 
 


wds02517-5234d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic