20552-3008 HDS 2980 (HD 199017)
20h 55m 13.68s -30° 08' 24.9" P.A. 334.00 sep 0.1 mag 8.65,10.00 Sp G5:V+... dist. 256.41 pc (836.41 l.y.)
| Coord 2000 |
20552-3008 |
|
Discov num |
HDS2980 |
|
Comp |
|
|
Coord arcsec 2000 |
20 55 13.68 -30 08 24.9 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
11 |
|
| Pa first |
22 |
|
Pa last |
333.8 |
|
P.A. Now (θ) |
333.8° |
|
| Sep first |
0.1 |
|
Sep last |
0.057 |
|
Sep. Now (ρ) |
0.057" |
|
| Mag pri |
8.65 |
|
Mag sec |
10.00 |
|
delta mag (ΔM) |
1.35 |
|
Spectral class |
G5:V+... (yellow) |
|
| Pri motion ra |
+009 |
|
Sec motion ra |
|
|
| Pri motion dec |
-032 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 199017 |
|
Constellation |
Microscopium |
|
SAO |
212541 |
|
HIP |
103264 |
|
| Tycho2 |
7458-01057-1 |
|
Gaia DR2 |
6794460111326479104 |
|
HD |
199017 |
|
CD |
CD-3018268 |
|
| CP |
CP-30 6386 |
|
Distance |
256.41 |
|
Distance ly |
836.41 |
|
ORBITAL ELEMENTS
| Period (P) | 38.74y | ± 2.38 |
Periastron (T) | 2019.08y | ± 0.12 |
Semi-major axis (a) | 0.093a | ± 0.005 |
| Eccentricity (e) | 0.65 | ± 0.015 |
Inclination (i) | 39.9° | ± 5.9 |
Longitude of periastron (ω) | 82.1° | ± 7.5 |
| Node (Ω) | 152.1° | ± 7.3 |
Notes | | |
Reference | Tok2021c | |
| Equinox | 2000 | |
Last observation | 2021 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
52.8 |
0.118 |
| 2001 |
56.2 |
0.118 |
| 2002 |
59.6 |
0.117 |
| 2003 |
63.1 |
0.115 |
| 2004 |
66.7 |
0.114 |
| 2005 |
70.3 |
0.112 |
| 2006 |
74.2 |
0.110 |
| 2007 |
78.1 |
0.107 |
| 2008 |
82.3 |
0.104 |
| 2009 |
86.8 |
0.101 |
| 2010 |
91.5 |
0.098 |
| 2011 |
96.6 |
0.094 |
| 2012 |
102.2 |
0.089 |
| 2013 |
108.5 |
0.084 |
| 2014 |
115.6 |
0.078 |
| 2015 |
124.1 |
0.071 |
| 2016 |
134.7 |
0.062 |
| 2017 |
149.4 |
0.051 |
| 2018 |
173.7 |
0.037 |
| 2019 |
226.0 |
0.025 |
| 2020 |
289.9 |
0.033 |
| 2021 |
319.6 |
0.048 |
| 2022 |
335.1 |
0.062 |
| 2023 |
345.4 |
0.073 |
| 2024 |
353.3 |
0.082 |
| 2025 |
359.7 |
0.089 |
| 2026 |
5.3 |
0.095 |
| 2027 |
10.2 |
0.100 |
| 2028 |
14.7 |
0.104 |
| 2029 |
18.9 |
0.108 |
| 2030 |
22.8 |
0.111 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
