20081-3929 RST2134

 
 
20h 08m 08.89s -39 29' 29.6" P.A. 49.6 sep 0.25 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
2015
Obs
8
Pa first
137
Pa last
53
P.A. Now (θ)
49.6°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.25"
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
 
 
Precise pa
53.4
Precise sep
0.242
Constellation
Sagittarius
HIP
99185
HD
190759
Distance
136.24
Distance ly
444.41
last precise pa
53.4
last precise sep
0.242
 
 
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 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.163 96.1
2001 0.167 92.3
2002 0.171 88.6
2003 0.175 85.1
2004 0.180 81.8
2005 0.185 78.6
2006 0.190 75.6
2007 0.196 72.8
2008 0.201 70.1
2009 0.206 67.6
2010 0.212 65.2
2011 0.217 62.9
2012 0.223 60.7
2013 0.228 58.7
2014 0.233 56.7
2015 0.238 54.8
2016 0.244 53.0
2017 0.249 51.2
2018 0.253 49.6
2019 0.258 48.0
2020 0.263 46.4
2021 0.267 44.9
2022 0.272 43.5
2023 0.276 42.1
2024 0.280 40.7
2025 0.284 39.4
2026 0.287 38.1
2027 0.291 36.9
2028 0.294 35.6
2029 0.297 34.4
2030 0.300 33.3

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

grafico orbita





wds20081-3929b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20081-3929 RST2134 1991 7 136 0.2 10.49 10.90 G0V NO 200808.89-392929.6
20081-3929 RST2134 2015 8 53 0.2 10.49 10.90 G0V O 200808.89-392929.6

If you need more information about this double, apply for a data request form to the WDS.