15227-4441 COP 2 AB

 
 
15h 22m 40.89s -44° 41' 22.5" P.A. 24.00 sep 0.2 mag 3.56,5.04 Sp B2IV-V dist. 156.99 pc (512.1 l.y.)
 
 
Coord 2000 15227-4441 Discov num COP   2 Comp AB Coord arcsec 2000 15 22 40.89 -44 41 22.5
Date first 1883 Date last 2021 Obs 47
Pa first 285 Pa last 23.9 P.A. Now (θ) 23.9°
Sep first 0.8 Sep last 0.153 Sep. Now (ρ) 0.153"
Mag pri 3.56 Mag sec 5.04 delta mag (ΔM) 1.48 Spectral class B2IV-V (blue-white)
Pri motion ra -014 Sec motion ra
Pri motion dec -018 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
15227-4441 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 225712 15 22 41 -44 41 22 RIZ 13 Aa,Ab 2010 1 25 0.1 3.60 5.10 1.50
Show 225712 15 22 41 -44 41 22 COP 2 AB 2021 47 24 0.2 3.56 5.04 1.48 Y <===
Show Eps Lup 225712 15 22 41 -44 41 22 DUN 182 AC 2020 26 168 26.2 3.56 9.10 5.54
Show 225712 15 22 41 -44 41 22 RIZ 13 AD 2016 3 190 38.9 3.37 16.20 12.83
Quintuple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Lupus SAO 225712 HIP 75264 Tycho2 7847-02505-1
Gaia DR2 6000130236633865856 HD 136504 HR 5708 GC 20659
CD CD-4410066 CP CP-44 7342 Bayer Epsilon Lupi Bayer name Eps Lup
Distance 156.99 Distance ly 512.1 Bayer greek ε Lup
 
 
ORBITAL ELEMENTS
 
 
Period (P)736.69y Periastron (T)2009.83y Semi-major axis (a)1.409a
Eccentricity (e)0.808 Inclination (i)117.6° Longitude of periastron (ω)19.6°
Node (Ω)125.1° Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 148.7 0.284
2001 145.5 0.286
2002 142.3 0.287
2003 139.1 0.288
2004 135.9 0.288
2005 132.6 0.286
2006 129.4 0.283
2007 126.0 0.279
2008 122.6 0.273
2009 118.9 0.266
2010 115.1 0.257
2011 110.9 0.246
2012 106.3 0.235
2013 101.2 0.223
2014 95.6 0.210
2015 89.2 0.199
2016 82.1 0.188
2017 74.3 0.180
2018 65.8 0.174
2019 56.8 0.171
2020 47.7 0.171
2021 38.9 0.175
2022 30.6 0.183
2023 23.1 0.193
2024 16.4 0.206
2025 10.5 0.220
2026 5.4 0.236
2027 1.0 0.253
2028 357.1 0.271
2029 353.8 0.290
2030 350.8 0.309


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



 
 


wds15227-4441b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic