03189-0101 BU 1177 (HD 20601)

 
 
03h 18m 52.91s -01° 01' 08.9" P.A. 193.00 sep 0.6 mag 10.28,10.38 Sp G5+G5 dist. 73.58 pc (240.02 l.y.)
 
 
Coord 2000 03189-0101 Discov num BU 1177 Comp Coord arcsec 2000 03 18 52.91 -01 01 08.9
Date first 1890 Date last 2019 Obs 40
Pa first 25 Pa last 193 P.A. Now (θ) 191.9°
Sep first 0.4 Sep last 0.611 Sep. Now (ρ) 0.619"
Mag pri 10.28 Mag sec 10.38 delta mag (ΔM) 0.1 Spectral class G5+G5 (yellow/yellow)
Pri motion ra +189 Sec motion ra +189
Pri motion dec +099 Sec motion dec +099
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 20601 Constellation Cetus HIP 15430 Tycho2 4708-00421-1
Gaia DR2 3262699879529089024 HD 20601 ADS 2464 BD BD-01 473
Distance 73.58 Distance ly 240.02
 
 
ORBITAL ELEMENTS
 
 
Period (P)258.4y± 25 Periastron (T)1903.1y± 7.5 Semi-major axis (a)0.494a± 0.003
Eccentricity (e)0.268± 0.015 Inclination (i)120.2°± 3 Longitude of periastron (ω)16.3°± 20
Node (Ω)16.2°± 1 Notesn ReferenceDoc2016i
Equinox2000 Last observation2015 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 202.0 0.592
2001 201.5 0.595
2002 201.1 0.598
2003 200.6 0.600
2004 200.2 0.603
2005 199.7 0.605
2006 199.3 0.607
2007 198.8 0.609
2008 198.4 0.611
2009 197.9 0.612
2010 197.5 0.614
2011 197.1 0.615
2012 196.6 0.616
2013 196.2 0.617
2014 195.8 0.618
2015 195.3 0.619
2016 194.9 0.619
2017 194.5 0.620
2018 194.0 0.620
2019 193.6 0.620
2020 193.2 0.620
2021 192.7 0.620
2022 192.3 0.620
2023 191.9 0.619
2024 191.5 0.619
2025 191.0 0.618
2026 190.6 0.617
2027 190.2 0.616
2028 189.7 0.615
2029 189.3 0.613
2030 188.9 0.612


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



 
 


wds03189-0101c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic