02512+0141 A 2338 (HD 17780)

 
 
02h 51m 11.57s +01° 40' 49.5" P.A. 21.00 sep 0.2 mag 9.90,10.60 Sp F5 dist. 131.41 pc (428.66 l.y.)
 
 
Coord 2000 02512+0141 Discov num A  2338 Comp Coord arcsec 2000 02 51 11.57 +01 40 49.5
Date first 1911 Date last 2017 Obs 18
Pa first 107 Pa last 21.2 P.A. Now (θ) 36.8°
Sep first 0.5 Sep last 0.176 Sep. Now (ρ) 0.205"
Mag pri 9.90 Mag sec 10.60 delta mag (ΔM) 0.7 Spectral class F5 (yellow-white)
Pri motion ra +006 Sec motion ra
Pri motion dec -010 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 17780 Constellation Cetus SAO 110789 HIP 13302
Tycho2 0048-00276-1 Gaia DR2 2499213882968076544 HD 17780 ADS 2177
DM BD+01 502 BD BD+01 501 Distance 131.41 Distance ly 428.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)180y Periastron (T)2005.98y Semi-major axis (a)0.308a
Eccentricity (e)0.736 Inclination (i)38.3° Longitude of periastron (ω)119.3°
Node (Ω)157.3° Notes ReferenceDoc2016a
Equinox2000 Last observation2015 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 187.6 0.120
2001 195.6 0.106
2002 206.1 0.092
2003 220.0 0.079
2004 238.4 0.070
2005 260.7 0.066
2006 283.3 0.069
2007 302.8 0.076
2008 318.2 0.086
2009 330.4 0.097
2010 340.1 0.107
2011 348.2 0.117
2012 355.1 0.126
2013 1.0 0.134
2014 6.3 0.143
2015 11.0 0.150
2016 15.2 0.158
2017 19.1 0.165
2018 22.6 0.172
2019 25.9 0.179
2020 28.9 0.186
2021 31.7 0.193
2022 34.3 0.199
2023 36.8 0.205
2024 39.1 0.211
2025 41.3 0.217
2026 43.4 0.223
2027 45.3 0.229
2028 47.2 0.235
2029 49.0 0.241
2030 50.7 0.246


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


 
  


wds02512%2B0141c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic