17386+5546 STF 2199 (HD 160780)
17h 38m 38.32s +55° 45' 34.9" P.A. 53.00 sep 2.0 mag 8.03,8.60 Sp F8V dist. 121.21 pc (395.39 l.y.)
| Coord 2000 |
17386+5546 |
|
Discov num |
STF2199 |
|
Comp |
|
|
Coord arcsec 2000 |
17 38 38.32 +55 45 34.9 |
|
| Date first |
1830 |
|
Date last |
2020 |
|
Obs |
248 |
|
| Pa first |
116 |
|
Pa last |
53.4 |
|
P.A. Now (θ) |
53.4° |
|
| Sep first |
1.7 |
|
Sep last |
2.04 |
|
Sep. Now (ρ) |
2.04" |
|
| Mag pri |
8.03 |
|
Mag sec |
8.60 |
|
delta mag (ΔM) |
0.57 |
|
Spectral class |
F8V (yellow-white) |
|
| Pri motion ra |
+004 |
|
Sec motion ra |
+004 |
|
| Pri motion dec |
-012 |
|
Sec motion dec |
-012 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 160780 |
|
Constellation |
Draco |
|
SAO |
30494 |
|
HIP |
86344 |
|
| Tycho2 |
3893-00469-1 |
|
Gaia DR2 |
1421106752993180672 |
|
HD |
160780 |
|
GC |
23956 |
|
| ADS |
10699 |
|
BD |
BD+55 1961 |
|
Distance |
121.21 |
|
Distance ly |
395.39 |
|
ORBITAL ELEMENTS
| Period (P) | 1126.0007y | ± 529.269 |
Periastron (T) | 1742.0237y | ± 56.4431 |
Semi-major axis (a) | 2.89677a | ± 0.99016 |
| Eccentricity (e) | 0.71716 | ± 0.22261 |
Inclination (i) | 120.38° | ± 15.261 |
Longitude of periastron (ω) | 297.078° | ± 22.188 |
| Node (Ω) | 148.322° | ± 29.574 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
58.4 |
1.967 |
| 2001 |
58.2 |
1.971 |
| 2002 |
57.9 |
1.975 |
| 2003 |
57.7 |
1.979 |
| 2004 |
57.4 |
1.983 |
| 2005 |
57.2 |
1.987 |
| 2006 |
56.9 |
1.991 |
| 2007 |
56.7 |
1.994 |
| 2008 |
56.5 |
1.998 |
| 2009 |
56.2 |
2.002 |
| 2010 |
56.0 |
2.006 |
| 2011 |
55.8 |
2.010 |
| 2012 |
55.5 |
2.014 |
| 2013 |
55.3 |
2.018 |
| 2014 |
55.1 |
2.022 |
| 2015 |
54.8 |
2.026 |
| 2016 |
54.6 |
2.030 |
| 2017 |
54.4 |
2.034 |
| 2018 |
54.1 |
2.038 |
| 2019 |
53.9 |
2.042 |
| 2020 |
53.7 |
2.046 |
| 2021 |
53.5 |
2.050 |
| 2022 |
53.2 |
2.054 |
| 2023 |
53.0 |
2.058 |
| 2024 |
52.8 |
2.062 |
| 2025 |
52.6 |
2.066 |
| 2026 |
52.4 |
2.070 |
| 2027 |
52.1 |
2.074 |
| 2028 |
51.9 |
2.078 |
| 2029 |
51.7 |
2.082 |
| 2030 |
51.5 |
2.086 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
