02415-7128 B 1923 (HD 17215)

 
 
02h 41m 27.29s -71° 27' 45.0" P.A. 240.00 sep 0.4 mag 8.13,9.31 Sp G6V dist. 53.76 pc (175.37 l.y.)
 
 
Coord 2000 02415-7128 Discov num B  1923 Comp Coord arcsec 2000 02 41 27.29 -71 27 45.0
Date first 1931 Date last 2021 Obs 24
Pa first 37 Pa last 240.3 P.A. Now (θ) 240.3°
Sep first 0.6 Sep last 0.373 Sep. Now (ρ) 0.373"
Mag pri 8.13 Mag sec 9.31 delta mag (ΔM) 1.18 Spectral class G6V (yellow)
Pri motion ra +147 Sec motion ra +147
Pri motion dec -068 Sec motion dec -068
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 17215 Constellation Hydrus SAO 255913 HIP 12548
Tycho2 9148-00395-1 Gaia DR2 4644298430956871040 HD 17215 GC 3285
CP CP-71 156 Distance 53.76 Distance ly 175.37
 
 
ORBITAL ELEMENTS
 
 
Period (P)99.3y Periastron (T)2011.43y Semi-major axis (a)0.528a
Eccentricity (e)0.37 Inclination (i)116° Longitude of periastron (ω)252.6°
Node (Ω)222.6° Notes ReferenceTok2019h
Equinox2000 Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 46.1 0.426
2001 43.8 0.416
2002 41.3 0.403
2003 38.7 0.388
2004 35.8 0.369
2005 32.6 0.348
2006 29.0 0.324
2007 24.7 0.297
2008 19.6 0.268
2009 13.1 0.238
2010 4.8 0.208
2011 353.9 0.181
2012 339.6 0.160
2013 322.0 0.148
2014 303.2 0.150
2015 286.4 0.165
2016 273.0 0.188
2017 262.9 0.217
2018 255.3 0.248
2019 249.4 0.280
2020 244.7 0.312
2021 240.8 0.342
2022 237.6 0.370
2023 234.7 0.396
2024 232.3 0.420
2025 230.1 0.443
2026 228.1 0.463
2027 226.2 0.480
2028 224.5 0.496
2029 222.9 0.510
2030 221.3 0.522


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


 
  


wds02415-7128c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic