15157-2736 BU 350 (HD 135390)

 
 
15h 15m 39.37s -27° 35' 46.6" P.A. 358.00 sep 0.1 mag 7.06,8.58 Sp F0IV+F6V dist. 122.1 pc (398.29 l.y.)
 
 
Coord 2000 15157-2736 Discov num BU  350 Comp Coord arcsec 2000 15 15 39.37 -27 35 46.6
Date first 1875 Date last 2020 Obs 36
Pa first 170 Pa last 358.1 P.A. Now (θ) 358.1°
Sep first 1.3 Sep last 0.146 Sep. Now (ρ) 0.146"
Mag pri 7.06 Mag sec 8.58 delta mag (ΔM) 1.52 Spectral class F0IV+F6V (yellow-white/yellow-white)
Pri motion ra -027 Sec motion ra -027
Pri motion dec +016 Sec motion dec +016
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 135390 Constellation Libra SAO 183316 HIP 74675
Tycho2 6770-01511-1 Gaia DR2 6213970679700670464 HD 135390 GC 20500
ADS 9552 CD CD-2710292 CP CP-27 5162 Distance 122.1
Distance ly 398.29
 
 
ORBITAL ELEMENTS
 
 
Period (P)1670y Periastron (T)2018.9y Semi-major axis (a)1.902a
Eccentricity (e)0.918 Inclination (i)138.7° Longitude of periastron (ω)40.8°
Node (Ω)41° Notes ReferenceDoc2020d
Equinox2000 Last observation2018 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 101.7 0.331
2001 99.6 0.321
2002 97.2 0.311
2003 94.8 0.301
2004 92.1 0.292
2005 89.3 0.282
2006 86.3 0.272
2007 83.0 0.262
2008 79.5 0.252
2009 75.7 0.242
2010 71.5 0.232
2011 67.0 0.222
2012 62.1 0.212
2013 56.7 0.202
2014 50.7 0.192
2015 44.0 0.181
2016 36.4 0.170
2017 27.8 0.159
2018 18.0 0.149
2019 6.9 0.140
2020 354.4 0.133
2021 340.9 0.130
2022 327.3 0.132
2023 314.4 0.138
2024 303.0 0.148
2025 293.3 0.161
2026 285.1 0.177
2027 278.4 0.194
2028 272.7 0.212
2029 268.0 0.231
2030 263.9 0.249


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


 
  


wds15157-2736a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic