17366+4827 COU 1922 (HD 160291)
17h 36m 33.92s +48° 27' 29.0" P.A. 79.00 sep 0.4 mag 7.72,9.64 Sp F6V dist. 54.14 pc (176.6 l.y.)
| Coord 2000 |
17366+4827 |
|
Discov num |
COU1922 |
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Comp |
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Coord arcsec 2000 |
17 36 33.92 +48 27 29.0 |
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| Date first |
1980 |
|
Date last |
2017 |
|
Obs |
24 |
|
| Pa first |
44 |
|
Pa last |
79.3 |
|
P.A. Now (θ) |
79.3° |
|
| Sep first |
0.4 |
|
Sep last |
0.375 |
|
Sep. Now (ρ) |
0.375" |
|
| Mag pri |
7.72 |
|
Mag sec |
9.64 |
|
delta mag (ΔM) |
1.92 |
|
Spectral class |
F6V (yellow-white) |
|
| Pri motion ra |
+101 |
|
Sec motion ra |
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| Pri motion dec |
-140 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 160291 |
|
Constellation |
Hercules |
|
SAO |
46836 |
|
HIP |
86173 |
|
| Tycho2 |
3513-00177-1 |
|
Gaia DR2 |
1366853555039564544 |
|
HD |
160291 |
|
GC |
23893 |
|
| BD |
BD+48 2541 |
|
Distance |
54.14 |
|
Distance ly |
176.6 |
|
ORBITAL ELEMENTS
| Period (P) | 49.43y | |
Periastron (T) | 2002.27y | |
Semi-major axis (a) | 0.304a | |
| Eccentricity (e) | 0.649 | |
Inclination (i) | 150.3° | |
Longitude of periastron (ω) | 285.6° | |
| Node (Ω) | 159.2° | |
Notes | | |
Reference | Doc2008f | |
| Equinox | 2000 | |
Last observation | 2006 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
314.6 |
0.151 |
| 2001 |
288.7 |
0.114 |
| 2002 |
245.1 |
0.094 |
| 2003 |
198.1 |
0.107 |
| 2004 |
167.5 |
0.137 |
| 2005 |
148.4 |
0.169 |
| 2006 |
135.1 |
0.197 |
| 2007 |
125.0 |
0.223 |
| 2008 |
116.9 |
0.246 |
| 2009 |
110.1 |
0.267 |
| 2010 |
104.3 |
0.286 |
| 2011 |
99.2 |
0.304 |
| 2012 |
94.6 |
0.320 |
| 2013 |
90.5 |
0.335 |
| 2014 |
86.6 |
0.349 |
| 2015 |
83.1 |
0.362 |
| 2016 |
79.8 |
0.373 |
| 2017 |
76.7 |
0.384 |
| 2018 |
73.8 |
0.394 |
| 2019 |
71.0 |
0.402 |
| 2020 |
68.3 |
0.410 |
| 2021 |
65.7 |
0.417 |
| 2022 |
63.2 |
0.423 |
| 2023 |
60.7 |
0.428 |
| 2024 |
58.3 |
0.433 |
| 2025 |
56.0 |
0.436 |
| 2026 |
53.6 |
0.439 |
| 2027 |
51.3 |
0.441 |
| 2028 |
49.1 |
0.441 |
| 2029 |
46.8 |
0.441 |
| 2030 |
44.5 |
0.440 |
|
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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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