15071-0217 A 689 (HD 133928)

15h 07m 08.61s -02° 16' 50.5" P.A. 327.00 sep 0.3 mag 8.20,8.70 Sp F8 dist. 95.24 pc (310.67 l.y.)

Coord 2000 15071-0217 Discov num A   689 Comp Coord arcsec 2000 15 07 08.61 -02 16 50.5
Date first 1904 Date last 2016 Obs 43
Pa first 315 Pa last 326.5 P.A. Now (θ) 326.5°
Sep first 0.3 Sep last 0.334 Sep. Now (ρ) 0.334"
Mag pri 8.20 Mag sec 8.70 delta mag (ΔM) 0.5 Spectral class F8 (yellow-white)
Pri motion ra -071 Sec motion ra
Pri motion dec +009 Sec motion dec
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 133928 Constellation Libra SAO 140332 HIP 73982
Tycho2 5004-00384-1 Gaia DR2 6339618745351109376 HD 133928 ADS 9504
BD BD-01 3021 Distance 95.24 Distance ly 310.67




ORBITAL ELEMENTS

Period (P)66y Periastron (T)1935.6y Semi-major axis (a)0.31a
Eccentricity (e)0.88 Inclination (i)103.9° Longitude of periastron (ω)65°
Node (Ω)164° Notes ReferenceBaz1987d
Equinox Last observation1982 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 180.0 0.074
2001 167.0 0.057
2002 3.1 0.029
2003 345.0 0.101
2004 341.1 0.146
2005 338.8 0.178
2006 337.1 0.203
2007 335.8 0.223
2008 334.7 0.240
2009 333.7 0.255
2010 332.9 0.267
2011 332.0 0.277
2012 331.3 0.286
2013 330.6 0.293
2014 329.9 0.299
2015 329.2 0.304
2016 328.6 0.309
2017 328.0 0.312
2018 327.4 0.315
2019 326.8 0.316
2020 326.2 0.317
2021 325.6 0.318
2022 325.0 0.318
2023 324.4 0.317
2024 323.8 0.316
2025 323.2 0.314
2026 322.6 0.312
2027 322.0 0.310
2028 321.3 0.307
2029 320.7 0.303
2030 320.0 0.299


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



 
 


wds15071-0217a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic