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 |
Notes | n | |
Reference | Doc2016i | |
| Equinox | 2000 | |
Last observation | 2015 | |
Grade | 4 | (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 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
