15550-1923 HU 1274 (47 Lib)

 
 
15h 55m 00.37s -19° 22' 58.4" P.A. 114.00 sep 0.4 mag 6.04,8.50 Sp B5V dist. 236.41 pc (771.17 l.y.)
 
 
Coord 2000 15550-1923 Discov num HU 1274 Comp Coord arcsec 2000 15 55 00.37 -19 22 58.4
Date first 1904 Date last 2018 Obs 39
Pa first 154 Pa last 113.9 P.A. Now (θ) 113.9°
Sep first 0.4 Sep last 0.41 Sep. Now (ρ) 0.41"
Mag pri 6.04 Mag sec 8.50 delta mag (ΔM) 2.46 Spectral class B5V (blue-white)
Pri motion ra -010 Sec motion ra -010
Pri motion dec -014 Sec motion dec -014
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 47 Lib Var name NSV7327 Lib Constellation Libra SAO 159572
HIP 77939 Tycho2 6195-00249-1 Gaia DR2 6247821859582891264 HD 142378
HR 5915 GC 21364 ADS 9834 BD BD-18 4195
CP CP-19 5926 Flamsteed 47 Librae Flamsteed name 47 Lib Distance 236.41
Distance ly 771.17
 
 
ORBITAL ELEMENTS
 
 
Period (P)361y Periastron (T)1974.3y Semi-major axis (a)0.576a
Eccentricity (e)0 Inclination (i)101.7° Longitude of periastron (ω)
Node (Ω)124.4° Notesn ReferenceZir2015a
Equinox2000 Last observation2009 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 118.8 0.522
2001 118.6 0.518
2002 118.3 0.513
2003 118.1 0.509
2004 117.8 0.504
2005 117.6 0.499
2006 117.3 0.494
2007 117.0 0.489
2008 116.7 0.484
2009 116.4 0.479
2010 116.1 0.473
2011 115.8 0.468
2012 115.5 0.462
2013 115.2 0.456
2014 114.9 0.450
2015 114.5 0.444
2016 114.2 0.438
2017 113.8 0.431
2018 113.5 0.425
2019 113.1 0.418
2020 112.7 0.412
2021 112.3 0.405
2022 111.9 0.398
2023 111.5 0.391
2024 111.0 0.384
2025 110.6 0.377
2026 110.1 0.370
2027 109.6 0.362
2028 109.0 0.355
2029 108.5 0.347
2030 107.9 0.340


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



 
 


wds15550-1923a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic