16450+2928 COU 490 (HD 151236)
16h 44m 58.51s +29° 27' 37.9" P.A. 294.00 sep 0.1 mag 8.80,8.80 Sp F5
| Coord 2000 |
16450+2928 |
|
Discov num |
COU 490 |
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Comp |
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Coord arcsec 2000 |
16 44 58.51 +29 27 37.9 |
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| Date first |
1970 |
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Date last |
2008 |
|
Obs |
32 |
|
| Pa first |
73 |
|
Pa last |
293.9 |
|
P.A. Now (θ) |
293.9° |
|
| Sep first |
0.2 |
|
Sep last |
0.121 |
|
Sep. Now (ρ) |
0.121" |
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| Mag pri |
8.80 |
|
Mag sec |
8.80 |
|
delta mag (ΔM) |
0 |
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Spectral class |
F5 (yellow-white) |
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| Pri motion ra |
+000 |
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Sec motion ra |
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| Pri motion dec |
-015 |
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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 151236 |
|
Constellation |
Hercules |
|
SAO |
84575 |
|
Tycho2 |
2070-00213-1 |
|
| Gaia DR2 |
1311212734756224640 |
|
HD |
151236 |
|
ORBITAL ELEMENTS
| Period (P) | 100.1y | ± 5 |
Periastron (T) | 2007.34y | ± 3.5 |
Semi-major axis (a) | 0.218a | ± 0.008 |
| Eccentricity (e) | 0.151 | ± 0.006 |
Inclination (i) | 130.1° | ± 1.5 |
Longitude of periastron (ω) | 68.8° | ± 11.2 |
| Node (Ω) | 1.7° | ± 2 |
Notes | n | |
Reference | Doc2008a | |
| Equinox | 2000 | |
Last observation | 2005 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
338.8 |
0.172 |
| 2001 |
335.1 |
0.166 |
| 2002 |
331.0 |
0.160 |
| 2003 |
326.6 |
0.154 |
| 2004 |
321.8 |
0.148 |
| 2005 |
316.6 |
0.142 |
| 2006 |
311.0 |
0.136 |
| 2007 |
304.9 |
0.131 |
| 2008 |
298.4 |
0.127 |
| 2009 |
291.4 |
0.124 |
| 2010 |
284.2 |
0.121 |
| 2011 |
276.7 |
0.120 |
| 2012 |
269.2 |
0.121 |
| 2013 |
261.8 |
0.122 |
| 2014 |
254.6 |
0.125 |
| 2015 |
247.8 |
0.129 |
| 2016 |
241.5 |
0.134 |
| 2017 |
235.7 |
0.139 |
| 2018 |
230.3 |
0.145 |
| 2019 |
225.3 |
0.152 |
| 2020 |
220.8 |
0.158 |
| 2021 |
216.6 |
0.165 |
| 2022 |
212.8 |
0.172 |
| 2023 |
209.3 |
0.178 |
| 2024 |
206.0 |
0.185 |
| 2025 |
202.9 |
0.191 |
| 2026 |
200.0 |
0.197 |
| 2027 |
197.2 |
0.202 |
| 2028 |
194.6 |
0.207 |
| 2029 |
192.1 |
0.211 |
| 2030 |
189.7 |
0.215 |
|
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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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