19471-0809 A 108 (HD 186847)
19h 47m 08.04s -08° 09' 09.9" P.A. 107.00 sep 0.3 mag 8.74,9.24 Sp K0 dist. 171.82 pc (560.48 l.y.)
| Coord 2000 |
19471-0809 |
|
Discov num |
A 108 |
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Comp |
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Coord arcsec 2000 |
19 47 08.04 -08 09 09.9 |
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| Date first |
1900 |
|
Date last |
2018 |
|
Obs |
43 |
|
| Pa first |
183 |
|
Pa last |
107.3 |
|
P.A. Now (θ) |
111.1° |
|
| Sep first |
0.3 |
|
Sep last |
0.315 |
|
Sep. Now (ρ) |
0.319" |
|
| Mag pri |
8.74 |
|
Mag sec |
9.24 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
K0 (yellow-orange) |
|
| Pri motion ra |
+003 |
|
Sec motion ra |
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| Pri motion dec |
-024 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 186847 |
|
Constellation |
Aquila |
|
SAO |
143795 |
|
HIP |
97350 |
|
| Tycho2 |
5724-01075-1 |
|
Gaia DR2 |
4196236344448739456 |
|
HD |
186847 |
|
ADS |
12911 |
|
| BD |
BD-08 5103 |
|
Distance |
171.82 |
|
Distance ly |
560.48 |
|
ORBITAL ELEMENTS
| Period (P) | 242.85y | |
Periastron (T) | 1946.34y | |
Semi-major axis (a) | 0.299a | |
| Eccentricity (e) | 0.717 | |
Inclination (i) | 51.4° | |
Longitude of periastron (ω) | 265° | |
| Node (Ω) | 53.8° | |
Notes | | |
Reference | Doc2017l | |
| Equinox | 2000 | |
Last observation | 2009 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
97.3 |
0.298 |
| 2001 |
98.0 |
0.300 |
| 2002 |
98.6 |
0.301 |
| 2003 |
99.3 |
0.302 |
| 2004 |
99.9 |
0.303 |
| 2005 |
100.5 |
0.305 |
| 2006 |
101.1 |
0.306 |
| 2007 |
101.7 |
0.307 |
| 2008 |
102.4 |
0.308 |
| 2009 |
103.0 |
0.309 |
| 2010 |
103.6 |
0.310 |
| 2011 |
104.2 |
0.310 |
| 2012 |
104.8 |
0.311 |
| 2013 |
105.4 |
0.312 |
| 2014 |
105.9 |
0.313 |
| 2015 |
106.5 |
0.314 |
| 2016 |
107.1 |
0.314 |
| 2017 |
107.7 |
0.315 |
| 2018 |
108.3 |
0.316 |
| 2019 |
108.9 |
0.316 |
| 2020 |
109.4 |
0.317 |
| 2021 |
110.0 |
0.318 |
| 2022 |
110.6 |
0.318 |
| 2023 |
111.1 |
0.319 |
| 2024 |
111.7 |
0.319 |
| 2025 |
112.3 |
0.320 |
| 2026 |
112.8 |
0.320 |
| 2027 |
113.4 |
0.321 |
| 2028 |
114.0 |
0.321 |
| 2029 |
114.5 |
0.321 |
| 2030 |
115.1 |
0.322 |
| 2031 |
115.6 |
0.322 |
| 2032 |
116.2 |
0.322 |
| 2033 |
116.7 |
0.323 |
| 2034 |
117.3 |
0.323 |
| 2035 |
117.8 |
0.323 |
| 2036 |
118.4 |
0.323 |
| 2037 |
118.9 |
0.324 |
| 2038 |
119.5 |
0.324 |
| 2039 |
120.0 |
0.324 |
| 2040 |
120.6 |
0.324 |
| 2041 |
121.1 |
0.324 |
| 2042 |
121.7 |
0.324 |
| 2043 |
122.2 |
0.325 |
| 2044 |
122.8 |
0.325 |
| 2045 |
123.3 |
0.325 |
| 2046 |
123.9 |
0.325 |
| 2047 |
124.4 |
0.325 |
| 2048 |
125.0 |
0.325 |
| 2049 |
125.5 |
0.325 |
| 2050 |
126.1 |
0.325 |
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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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