02514-2139 DON 43 (HD 17884)

 
 
02h 51m 21.23s -21° 38' 40.9" P.A. 287.00 sep 0.2 mag 9.80,10.00 Sp F2+F4 dist. 73.05 pc (238.29 l.y.)
 
 
Coord 2000 02514-2139 Discov num DON  43 Comp Coord arcsec 2000 02 51 21.23 -21 38 40.9
Date first 1930 Date last 2021 Obs 15
Pa first 334 Pa last 287.4 P.A. Now (θ) 295.5°
Sep first 0.2 Sep last 0.209 Sep. Now (ρ) 0.202"
Mag pri 9.80 Mag sec 10.00 delta mag (ΔM) 0.2 Spectral class F2+F4 (yellow-white/yellow-white)
Pri motion ra +073 Sec motion ra
Pri motion dec -001 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 17884 Constellation Eridanus HIP 13317 Tycho2 5870-00612-1
HD 17884 CD CD-30 1072 CP CP-30 349 Distance 73.05
Distance ly 238.29
 
 
ORBITAL ELEMENTS
 
 
Period (P)108.42y± 2.5 Periastron (T)1972.75y± 0.3 Semi-major axis (a)0.242a± 0.004
Eccentricity (e)0.362± 0.003 Inclination (i)52.1°± 0.5 Longitude of periastron (ω)94.1°± 2.5
Node (Ω)29.6°± 0.5 Notesn ReferenceDoc2016i
Equinox2000 Last observation2015 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 239.3 0.229
2001 241.4 0.229
2002 243.6 0.228
2003 245.7 0.226
2004 247.9 0.225
2005 250.1 0.224
2006 252.4 0.222
2007 254.6 0.220
2008 256.9 0.219
2009 259.3 0.217
2010 261.7 0.215
2011 264.1 0.214
2012 266.5 0.212
2013 269.0 0.211
2014 271.5 0.209
2015 274.1 0.208
2016 276.7 0.207
2017 279.3 0.205
2018 282.0 0.204
2019 284.6 0.204
2020 287.3 0.203
2021 290.0 0.202
2022 292.8 0.202
2023 295.5 0.202
2024 298.2 0.202
2025 300.9 0.202
2026 303.7 0.203
2027 306.4 0.203
2028 309.0 0.204
2029 311.7 0.205
2030 314.3 0.206


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



 
 


wds02514-2139b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic