19169+6312 STF 2509 (HD 181566)
19h 16m 53.09s +63° 12' 27.0" P.A. 328.00 sep 1.8 mag 7.44,8.17 Sp F6V dist. 78.25 pc (255.25 l.y.)
| Coord 2000 |
19169+6312 |
|
Discov num |
STF2509 |
|
Comp |
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Coord arcsec 2000 |
19 16 53.09 +63 12 27.0 |
|
| Date first |
1831 |
|
Date last |
2018 |
|
Obs |
119 |
|
| Pa first |
351 |
|
Pa last |
328.4 |
|
P.A. Now (θ) |
328.4° |
|
| Sep first |
0.5 |
|
Sep last |
1.838 |
|
Sep. Now (ρ) |
1.838" |
|
| Mag pri |
7.44 |
|
Mag sec |
8.17 |
|
delta mag (ΔM) |
0.73 |
|
Spectral class |
F6V (yellow-white) |
|
| Pri motion ra |
+028 |
|
Sec motion ra |
+028 |
|
| Pri motion dec |
-021 |
|
Sec motion dec |
-021 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 181566 |
|
Constellation |
Draco |
|
SAO |
18257 |
|
HIP |
94760 |
|
| Tycho2 |
4221-00314-1 |
|
Gaia DR2 |
2252520509199021696 |
|
HD |
181566 |
|
GC |
26632 |
|
| ADS |
12296 |
|
BD |
BD+62 1702 |
|
Distance |
78.25 |
|
Distance ly |
255.25 |
|
ORBITAL ELEMENTS
| Period (P) | 627y | |
Periastron (T) | 1737y | |
Semi-major axis (a) | 1.345a | |
| Eccentricity (e) | 0.75 | |
Inclination (i) | 101.2° | |
Longitude of periastron (ω) | 325.4° | |
| Node (Ω) | 139.6° | |
Notes | | |
Reference | Zir2014a | |
| Equinox | 2000 | |
Last observation | 2011 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
329.2 |
1.771 |
| 2001 |
329.1 |
1.775 |
| 2002 |
329.1 |
1.780 |
| 2003 |
329.0 |
1.784 |
| 2004 |
329.0 |
1.788 |
| 2005 |
329.0 |
1.793 |
| 2006 |
328.9 |
1.797 |
| 2007 |
328.9 |
1.801 |
| 2008 |
328.8 |
1.806 |
| 2009 |
328.8 |
1.810 |
| 2010 |
328.7 |
1.814 |
| 2011 |
328.7 |
1.818 |
| 2012 |
328.7 |
1.822 |
| 2013 |
328.6 |
1.826 |
| 2014 |
328.6 |
1.831 |
| 2015 |
328.5 |
1.835 |
| 2016 |
328.5 |
1.839 |
| 2017 |
328.5 |
1.843 |
| 2018 |
328.4 |
1.846 |
| 2019 |
328.4 |
1.850 |
| 2020 |
328.4 |
1.854 |
| 2021 |
328.3 |
1.858 |
| 2022 |
328.3 |
1.862 |
| 2023 |
328.2 |
1.865 |
| 2024 |
328.2 |
1.869 |
| 2025 |
328.2 |
1.873 |
| 2026 |
328.1 |
1.877 |
| 2027 |
328.1 |
1.880 |
| 2028 |
328.0 |
1.884 |
| 2029 |
328.0 |
1.887 |
| 2030 |
328.0 |
1.891 |
| 2031 |
327.9 |
1.894 |
| 2032 |
327.9 |
1.898 |
| 2033 |
327.9 |
1.901 |
| 2034 |
327.8 |
1.904 |
| 2035 |
327.8 |
1.908 |
| 2036 |
327.7 |
1.911 |
| 2037 |
327.7 |
1.914 |
| 2038 |
327.7 |
1.917 |
| 2039 |
327.6 |
1.921 |
| 2040 |
327.6 |
1.924 |
| 2041 |
327.6 |
1.927 |
| 2042 |
327.5 |
1.930 |
| 2043 |
327.5 |
1.933 |
| 2044 |
327.5 |
1.936 |
| 2045 |
327.4 |
1.939 |
| 2046 |
327.4 |
1.942 |
| 2047 |
327.4 |
1.945 |
| 2048 |
327.3 |
1.948 |
| 2049 |
327.3 |
1.951 |
| 2050 |
327.2 |
1.953 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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