00284-2020 B 1909 (HD 2475)

 
 
00h 28m 21.17s -20 20' 05.2" P.A. 321.00 sep 0.1 mag 7.23,7.40 Sp G0V dist. 32.2 pc (105.04 l.y.)
 
 
Coord 2000 00284-2020 Discov num B  1909 Comp Coord arcsec 2000 00 28 21.17 -20 20 05.2
Date first 1929 Date last 2021 Obs 92
Pa first 119 Pa last 320.5 P.A. Now (θ) 13.6°
Sep first 0.2 Sep last 0.143 Sep. Now (ρ) 0.073"
Mag pri 7.23 Mag sec 7.40 delta mag (ΔM) 0.17 Spectral class G0V (yellow)
Pri motion ra -116 Sec motion ra
Pri motion dec -114 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 2475 Constellation Cetus SAO 166296 HIP 2237
Tycho2 5846-00959-1 Gaia DR2 2363291052952046208 HD 2475 HR 108
GC 554 BD BD-21 57 FK5 2029 Distance 32.2
Distance ly 105.04
 
 
ORBITAL ELEMENTS
 
 
Period (P)11.35y Periastron (T)1995.09y Semi-major axis (a)0.202a
Eccentricity (e)0.005 Inclination (i)69.8° Longitude of periastron (ω)99°
Node (Ω)119.49° Notesn ReferenceHrt2010a
Equinox2000 Last observation2009 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 351.6 0.086
2001 69.9 0.088
2002 102.1 0.157
2003 115.8 0.199
2004 127.1 0.190
2005 144.0 0.133
2006 195.0 0.071
2007 265.3 0.110
2008 287.7 0.176
2009 299.8 0.202
2010 311.9 0.175
2011 334.7 0.109
2012 44.8 0.072
2013 94.7 0.134
2014 111.7 0.190
2015 123.0 0.199
2016 136.6 0.157
2017 169.2 0.087
2018 248.7 0.086
2019 282.1 0.156
2020 295.9 0.199
2021 307.2 0.190
2022 324.1 0.134
2023 13.6 0.073
2024 84.0 0.109
2025 107.0 0.175
2026 119.1 0.202
2027 131.0 0.177
2028 153.0 0.111
2029 222.4 0.071
2030 274.5 0.132


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



 
 


wds00284-2020a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic