04257-0214 BU 403 (HD 28072)

 
 
04h 25m 41.85s -02° 13' 56.8" P.A. 81.00 sep 0.9 mag 7.47,9.42 Sp F8 dist. 42.74 pc (139.42 l.y.)
 
 
Coord 2000 04257-0214 Discov num BU  403 Comp Coord arcsec 2000 04 25 41.85 -02 13 56.8
Date first 1877 Date last 2021 Obs 55
Pa first 101 Pa last 81 P.A. Now (θ) 81°
Sep first 2.0 Sep last 0.866 Sep. Now (ρ) 0.866"
Mag pri 7.47 Mag sec 9.42 delta mag (ΔM) 1.95 Spectral class F8 (yellow-white)
Pri motion ra +058 Sec motion ra +058
Pri motion dec +003 Sec motion dec +003
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 28072 Constellation Eridanus HIP 20673 Tycho2 4727-01564-1
Gaia DR2 3205679721908034688 HD 28072 ADS 3214 BD BD-02 899
Distance 42.74 Distance ly 139.42
 
 
ORBITAL ELEMENTS
 
 
Period (P)591.8784y± 531.0418 Periastron (T)1813.2516y± 38.4593 Semi-major axis (a)3.48625a± 3.49971
Eccentricity (e)0.77632± 0.18548 Inclination (i)93.249°± 2.561 Longitude of periastron (ω)273.16°± 28.04
Node (Ω)103.414°± 2.192 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 87.2 1.115
2001 87.0 1.104
2002 86.8 1.092
2003 86.5 1.081
2004 86.3 1.069
2005 86.1 1.058
2006 85.8 1.046
2007 85.6 1.035
2008 85.3 1.023
2009 85.1 1.012
2010 84.8 1.000
2011 84.6 0.989
2012 84.3 0.977
2013 84.0 0.966
2014 83.7 0.954
2015 83.4 0.943
2016 83.1 0.931
2017 82.8 0.920
2018 82.5 0.908
2019 82.2 0.897
2020 81.8 0.885
2021 81.5 0.874
2022 81.2 0.862
2023 80.8 0.851
2024 80.4 0.839
2025 80.0 0.828
2026 79.7 0.816
2027 79.2 0.805
2028 78.8 0.794
2029 78.4 0.782
2030 78.0 0.771


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



 
 


wds04257-0214a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic