19082-0520 RST 4618 (HD 178286)

19h 08m 14.39s -05° 19' 57.8" P.A. 291.00 sep 0.2 mag 8.60,8.80 Sp A3 dist. 198.81 pc (648.52 l.y.)

Coord 2000 19082-0520 Discov num RST4618 Comp Coord arcsec 2000 19 08 14.39 -05 19 57.8
Date first 1938 Date last 2021 Obs 15
Pa first 324 Pa last 290.6 P.A. Now (θ) 290.6°
Sep first 0.4 Sep last 0.215 Sep. Now (ρ) 0.215"
Mag pri 8.60 Mag sec 8.80 delta mag (ΔM) 0.2 Spectral class A3 (white)
Pri motion ra +011 Sec motion ra
Pri motion dec -004 Sec motion dec
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 178286 Constellation Aquila SAO 143061 HIP 93991
Tycho2 5137-01309-1 Gaia DR2 4206281100421616512 HD 178286 GC 26341
BD BD-05 4884 Distance 198.81 Distance ly 648.52




ORBITAL ELEMENTS

Period (P)137y± 15 Periastron (T)1984.44y± 0.59 Semi-major axis (a)0.206a± 0.013
Eccentricity (e)0.593± 0.034 Inclination (i)58.4°± 2 Longitude of periastron (ω)163°± 5.3
Node (Ω)319.8°± 3.2 Notes ReferenceTok2021f
Equinox Last observation2021 Grade5(1=Definitive, 9=Indet.)

label theta rho
2000 238.9 0.091
2001 244.3 0.095
2002 249.2 0.100
2003 253.7 0.106
2004 257.6 0.112
2005 261.2 0.118
2006 264.4 0.124
2007 267.3 0.130
2008 269.9 0.137
2009 272.3 0.143
2010 274.5 0.150
2011 276.6 0.156
2012 278.4 0.162
2013 280.1 0.168
2014 281.7 0.175
2015 283.2 0.181
2016 284.6 0.187
2017 285.9 0.192
2018 287.2 0.198
2019 288.3 0.204
2020 289.4 0.209
2021 290.5 0.215
2022 291.5 0.220
2023 292.4 0.225
2024 293.3 0.230
2025 294.2 0.235
2026 295.0 0.240
2027 295.8 0.245
2028 296.6 0.249
2029 297.4 0.254
2030 298.1 0.258


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



 
 


wds19082-0520a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic