17141-0824 BAR 7 (HD 155802)

 
 
17h 14m 08.07s -08° 24' 13.8" P.A. 44.00 sep 1.5 mag 8.64,11.69 Sp K3V dist. 30.01 pc (97.89 l.y.)
 
 
Coord 2000 17141-0824 Discov num BAR   7 Comp Coord arcsec 2000 17 14 08.07 -08 24 13.8
Date first 1891 Date last 2018 Obs 18
Pa first 154 Pa last 43.7 P.A. Now (θ) 43.7°
Sep first 2.2 Sep last 1.495 Sep. Now (ρ) 1.495"
Mag pri 8.64 Mag sec 11.69 delta mag (ΔM) 3.05 Spectral class K3V (yellow-orange)
Pri motion ra -108 Sec motion ra -102
Pri motion dec +071 Sec motion dec +070
Notes O (Orbital solution)
rPM=0.047 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 155802 Constellation Ophiuchus SAO 141567 HIP 84303
Tycho2 5645-00112-1 Gaia DR2 4359814876901570688 HD 155802 ADS 10404
BD BD-08 4400 Distance 30.01 Distance ly 97.89
 
 
ORBITAL ELEMENTS
 
 
Period (P)390y Periastron (T)2081.4y Semi-major axis (a)1.878a
Eccentricity (e)0.204 Inclination (i)140.4° Longitude of periastron (ω)206.9°
Node (Ω)177.8° Notes ReferenceTok2021f
Equinox Last observation2018 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 64.6 1.478
2001 63.5 1.478
2002 62.4 1.477
2003 61.2 1.477
2004 60.1 1.478
2005 59.0 1.478
2006 57.9 1.478
2007 56.7 1.479
2008 55.6 1.480
2009 54.5 1.481
2010 53.4 1.482
2011 52.3 1.483
2012 51.1 1.484
2013 50.0 1.486
2014 48.9 1.487
2015 47.8 1.489
2016 46.7 1.490
2017 45.6 1.492
2018 44.5 1.494
2019 43.4 1.496
2020 42.3 1.498
2021 41.2 1.500
2022 40.1 1.502
2023 39.0 1.504
2024 37.9 1.506
2025 36.9 1.508
2026 35.8 1.510
2027 34.7 1.512
2028 33.6 1.514
2029 32.6 1.517
2030 31.5 1.519


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



 
 


wds17141-0824c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic