03236-4005 I 468 (HD 21175)

 
 
03h 23m 35.23s -40° 04' 35.4" P.A. 127.00 sep 2.8 mag 6.80,11.00 Sp K0V dist. 17.42 pc (56.82 l.y.)
 
 
Coord 2000 03236-4005 Discov num I   468 Comp Coord arcsec 2000 03 23 35.23 -40 04 35.4
Date first 1909 Date last 2021 Obs 24
Pa first 210 Pa last 127.1 P.A. Now (θ) 127.1°
Sep first 2.0 Sep last 2.849 Sep. Now (ρ) 2.849"
Mag pri 6.80 Mag sec 11.00 delta mag (ΔM) 4.2 Spectral class K0V (yellow-orange)
Pri motion ra +073 Sec motion ra
Pri motion dec -026 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 21175 Constellation Eridanus SAO 216292 HIP 15799
Tycho2 7571-00425-1 Gaia DR2 4852870701504645376 HD 21175 GC 4061
GL NN 3222A CD CD-40 898 CP CP-40 310 Distance 17.42
Distance ly 56.82
 
 
ORBITAL ELEMENTS
 
 
Period (P)217.702y± 31.3008 Periastron (T)1970.7215y± 1.4622 Semi-major axis (a)2.32852a± 0.10837
Eccentricity (e)0.48485± 0.06404 Inclination (i)41.816°± 3.627 Longitude of periastron (ω)230.607°± 13.28
Node (Ω)121.616°± 11.983 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 103.2 1.964
2001 104.6 2.010
2002 106.0 2.055
2003 107.4 2.098
2004 108.7 2.140
2005 110.0 2.182
2006 111.2 2.222
2007 112.3 2.261
2008 113.5 2.299
2009 114.5 2.336
2010 115.6 2.371
2011 116.6 2.406
2012 117.6 2.440
2013 118.6 2.472
2014 119.5 2.504
2015 120.4 2.534
2016 121.3 2.564
2017 122.2 2.593
2018 123.1 2.620
2019 123.9 2.647
2020 124.8 2.673
2021 125.6 2.698
2022 126.4 2.721
2023 127.1 2.744
2024 127.9 2.767
2025 128.7 2.788
2026 129.4 2.808
2027 130.2 2.828
2028 130.9 2.847
2029 131.6 2.865
2030 132.3 2.882


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



 
 


wds03236-4005c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic