19172-6640 GLE 3 (HD 179366)

 
 
19h 17m 12.25s -66° 39' 39.8" P.A. 355.00 sep 0.5 mag 6.12,6.42 Sp A5V+A8V dist. 91.58 pc (298.73 l.y.)
 
 
Coord 2000 19172-6640 Discov num GLE   3 Comp Coord arcsec 2000 19 17 12.25 -66 39 39.8
Date first 1894 Date last 2019 Obs 44
Pa first 40 Pa last 354.6 P.A. Now (θ) 359.7°
Sep first 0.5 Sep last 0.522 Sep. Now (ρ) 0.533"
Mag pri 6.12 Mag sec 6.42 delta mag (ΔM) 0.3 Spectral class A5V+A8V (white/white)
Pri motion ra +017 Sec motion ra +017
Pri motion dec -003 Sec motion dec -003
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 179366 Constellation Pavo SAO 254515 HIP 94789
Tycho2 9083-01820-1 Gaia DR2 6434091803770731648 HD 179366 HR 7278
GC 26512 CP CP-66 3417 Distance 91.58 Distance ly 298.73
 
 
ORBITAL ELEMENTS
 
 
Period (P)156.8y± 8 Periastron (T)1950.69y± 0.5 Semi-major axis (a)0.539a± 0.05
Eccentricity (e)0.568± 0.02 Inclination (i)50.8°± 1 Longitude of periastron (ω)98°± 2
Node (Ω)84.5°± 2 Notesn ReferenceDoc2007d
Equinox2000 Last observation1991 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 330.1 0.506
2001 331.4 0.507
2002 332.8 0.508
2003 334.1 0.509
2004 335.4 0.510
2005 336.8 0.511
2006 338.1 0.512
2007 339.4 0.514
2008 340.7 0.515
2009 342.0 0.516
2010 343.3 0.517
2011 344.6 0.518
2012 345.9 0.519
2013 347.2 0.520
2014 348.5 0.521
2015 349.8 0.523
2016 351.0 0.524
2017 352.3 0.525
2018 353.5 0.526
2019 354.8 0.528
2020 356.0 0.529
2021 357.3 0.530
2022 358.5 0.532
2023 359.7 0.533
2024 0.9 0.535
2025 2.2 0.536
2026 3.4 0.537
2027 4.6 0.539
2028 5.7 0.540
2029 6.9 0.542
2030 8.1 0.543


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



 
 


wds19172-6640a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic