14565+0255 A 2172 (HD 131954)

 
 
14h 56m 30.89s +02° 55' 12.2" P.A. 122.00 sep 0.2 mag 8.00,8.60 Sp K0
 
 
Coord 2000 14565+0255 Discov num A  2172 Comp Coord arcsec 2000 14 56 30.89 +02 55 12.2
Date first 1910 Date last 2019 Obs 26
Pa first 339 Pa last 122.4 P.A. Now (θ) 113.8°
Sep first 0.2 Sep last 0.169 Sep. Now (ρ) 0.156"
Mag pri 8.00 Mag sec 8.60 delta mag (ΔM) 0.6 Spectral class K0 (yellow-orange)
Pri motion ra +015 Sec motion ra
Pri motion dec +026 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 131954 Constellation Virgo SAO 120747 Tycho2 0330-00180-1
Gaia DR2 1154515251007422464 HD 131954 ADS 9443
 
 
ORBITAL ELEMENTS
 
 
Period (P)168.3y Periastron (T)2000.4y Semi-major axis (a)0.196a
Eccentricity (e)0.177 Inclination (i)115° Longitude of periastron (ω)326°
Node (Ω)128.5° Notes ReferenceHrt2010a
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 145.1 0.137
2001 143.4 0.141
2002 141.7 0.145
2003 140.1 0.148
2004 138.6 0.151
2005 137.1 0.154
2006 135.7 0.157
2007 134.3 0.159
2008 133.0 0.161
2009 131.7 0.163
2010 130.4 0.164
2011 129.2 0.165
2012 127.9 0.166
2013 126.7 0.166
2014 125.4 0.166
2015 124.2 0.166
2016 123.0 0.166
2017 121.7 0.165
2018 120.5 0.164
2019 119.2 0.163
2020 117.9 0.161
2021 116.6 0.160
2022 115.2 0.158
2023 113.8 0.156
2024 112.4 0.153
2025 110.9 0.151
2026 109.4 0.148
2027 107.8 0.145
2028 106.1 0.142
2029 104.4 0.139
2030 102.6 0.136


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



 
 


wds14565%2B0255b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic