13331+4316 COU 1754

13h 33m 08.21s +43° 15' 10.2" P.A. 163.00 sep 0.3 mag 10.18,10.21 Sp K8V dist. 32.59 pc (106.31 l.y.)

Coord 2000 13331+4316 Discov num COU1754 Comp Coord arcsec 2000 13 33 08.21 +43 15 10.2
Date first 1979 Date last 2014 Obs 18
Pa first 162 Pa last 162.7 P.A. Now (θ) 162.7°
Sep first 0.7 Sep last 0.26 Sep. Now (ρ) 0.26"
Mag pri 10.18 Mag sec 10.21 delta mag (ΔM) 0.03 Spectral class K8V (yellow-orange)
Pri motion ra +022 Sec motion ra +022
Pri motion dec -044 Sec motion dec -044
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Constellation Canes Venatici HIP 66110 Tycho2 3031-00536-1 Gaia DR2 1501385640285547520
BD BD+44 2279 Distance 32.59 Distance ly 106.31




ORBITAL ELEMENTS

Period (P)125.5y± 2 Periastron (T)2056.4y± 1.2 Semi-major axis (a)0.6254a± 0.0059
Eccentricity (e)0.189± 0.018 Inclination (i)94.865°± 0.073 Longitude of periastron (ω)230.13°± 0.21
Node (Ω)171.25°± 0.34 Notes ReferenceHor2021b
Equinox Last observation Grade5(1=Definitive, 9=Indet.)

label theta rho
2000 161.9 0.342
2001 161.0 0.319
2002 160.0 0.295
2003 158.8 0.271
2004 157.4 0.246
2005 155.7 0.221
2006 153.6 0.196
2007 150.8 0.172
2008 147.1 0.147
2009 141.9 0.123
2010 134.4 0.101
2011 122.8 0.080
2012 104.8 0.066
2013 80.2 0.060
2014 55.7 0.066
2015 37.9 0.081
2016 26.5 0.101
2017 19.0 0.124
2018 13.9 0.148
2019 10.2 0.172
2020 7.4 0.197
2021 5.3 0.221
2022 3.6 0.246
2023 2.2 0.270
2024 1.0 0.293
2025 360.0 0.317
2026 359.1 0.339
2027 358.4 0.361
2028 357.7 0.382
2029 357.1 0.402
2030 356.5 0.421


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



 
 


wds13331%2B4316a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic