20081-3929 RST 2134 (HD 190759)

 
 
20h 08m 08.89s -39 29' 29.6" P.A. 50.00 sep 0.3 mag 10.49,10.90 Sp G0+G0 dist. 136.24 pc (444.41 l.y.)
 
 
Coord 2000 20081-3929 Discov num RST2134 Comp Coord arcsec 2000 20 08 08.89 -39 29 29.6
Date first 1932 Date last 2018 Obs 9
Pa first 137 Pa last 49.6 P.A. Now (θ) 49.6°
Sep first 0.2 Sep last 0.251 Sep. Now (ρ) 0.251"
Mag pri 10.49 Mag sec 10.90 delta mag (ΔM) 0.41 Spectral class G0+G0 (yellow/yellow)
Pri motion ra -014 Sec motion ra
Pri motion dec +010 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 190759 Constellation Sagittarius HIP 99185 Tycho2 7951-00440-1
Gaia DR2 6693559612872066304 HD 190759 CD CD-3913627 CP CP-39 8624
Distance 136.24 Distance ly 444.41
 
 
ORBITAL ELEMENTS
 
 
Period (P)151.79y± 5 Periastron (T)1977.23y± 0.75 Semi-major axis (a)0.259a± 0.008
Eccentricity (e)0.258± 0.03 Inclination (i)133.1°± 3 Longitude of periastron (ω)198.9°± 5
Node (Ω)22.2°± 3 Notesn ReferenceDoc2016i
Equinox2000 Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 96.1 0.163
2001 92.3 0.167
2002 88.6 0.171
2003 85.1 0.175
2004 81.8 0.180
2005 78.6 0.185
2006 75.6 0.190
2007 72.8 0.196
2008 70.1 0.201
2009 67.6 0.206
2010 65.2 0.212
2011 62.9 0.217
2012 60.7 0.223
2013 58.7 0.228
2014 56.7 0.233
2015 54.8 0.238
2016 53.0 0.244
2017 51.2 0.249
2018 49.6 0.253
2019 48.0 0.258
2020 46.4 0.263
2021 44.9 0.267
2022 43.5 0.272
2023 42.1 0.276
2024 40.7 0.280
2025 39.4 0.284
2026 38.1 0.287
2027 36.9 0.291
2028 35.6 0.294
2029 34.4 0.297
2030 33.3 0.300


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



 
 


wds20081-3929b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic