20111-5731 HDO 295 (HD 191095)

 
 
20h 11m 07.43s -57 31' 27.3" P.A. 301.00 sep 0.2 mag 6.76,7.68 Sp B7V+A3V dist. 160 pc (521.92 l.y.)
 
 
Coord 2000 20111-5731 Discov num HDO 295 Comp Coord arcsec 2000 20 11 07.43 -57 31 27.3
Date first 1901 Date last 2021 Obs 29
Pa first 228 Pa last 300.9 P.A. Now (θ) 300.9°
Sep first 0.7 Sep last 0.247 Sep. Now (ρ) 0.247"
Mag pri 6.76 Mag sec 7.68 delta mag (ΔM) 0.92 Spectral class B7V+A3V (blue-white/white)
Pri motion ra +016 Sec motion ra +016
Pri motion dec -035 Sec motion dec -035
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 191095 Constellation Pavo SAO 246470 HIP 99453
Tycho2 8784-01295-1 Gaia DR2 6444646501219089408 HD 191095 HR 7691
GC 27966 CP CP-57 9622 Distance 160 Distance ly 521.92
 
 
ORBITAL ELEMENTS
 
 
Period (P)500y Periastron (T)2030.1y Semi-major axis (a)0.862a
Eccentricity (e)0.6 Inclination (i)66.4° Longitude of periastron (ω)262.5°
Node (Ω)93.9° Notesn ReferenceTok2021f
Equinox2000 Last observation2021 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 274.3 0.507
2001 274.9 0.499
2002 275.6 0.490
2003 276.4 0.481
2004 277.1 0.472
2005 277.9 0.462
2006 278.7 0.452
2007 279.6 0.441
2008 280.5 0.430
2009 281.4 0.419
2010 282.4 0.407
2011 283.5 0.395
2012 284.6 0.383
2013 285.9 0.370
2014 287.2 0.357
2015 288.6 0.343
2016 290.1 0.329
2017 291.7 0.315
2018 293.5 0.301
2019 295.5 0.286
2020 297.7 0.271
2021 300.2 0.256
2022 303.0 0.241
2023 306.1 0.227
2024 309.7 0.212
2025 313.7 0.198
2026 318.4 0.185
2027 323.8 0.172
2028 330.0 0.161
2029 337.0 0.152
2030 344.9 0.145


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



 
 


wds20111-5731a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic