16371+1732 COU 311
16h 37m 05.87s +17° 31' 54.0" P.A. 106.00 sep 0.3 mag 10.30,10.30 Sp K0
| Coord 2000 |
16371+1732 |
|
Discov num |
COU 311 |
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Comp |
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Coord arcsec 2000 |
16 37 05.87 +17 31 54.0 |
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| Date first |
1968 |
|
Date last |
2013 |
|
Obs |
15 |
|
| Pa first |
80 |
|
Pa last |
105.9 |
|
P.A. Now (θ) |
105.9° |
|
| Sep first |
0.2 |
|
Sep last |
0.282 |
|
Sep. Now (ρ) |
0.282" |
|
| Mag pri |
10.30 |
|
Mag sec |
10.30 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
K0 (yellow-orange) |
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| Pri motion ra |
-021 |
|
Sec motion ra |
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|
| Pri motion dec |
+013 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
Tycho2 |
1523-01213-1 |
|
ORBITAL ELEMENTS
| Period (P) | 157.89y | |
Periastron (T) | 1950.24y | |
Semi-major axis (a) | 0.263a | |
| Eccentricity (e) | 0.55 | |
Inclination (i) | 44° | |
Longitude of periastron (ω) | 217.2° | |
| Node (Ω) | 95.1° | |
Notes | | |
Reference | Cou1999b | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
104.1 |
0.362 |
| 2001 |
104.8 |
0.364 |
| 2002 |
105.5 |
0.366 |
| 2003 |
106.2 |
0.368 |
| 2004 |
106.9 |
0.370 |
| 2005 |
107.6 |
0.371 |
| 2006 |
108.3 |
0.373 |
| 2007 |
108.9 |
0.374 |
| 2008 |
109.6 |
0.375 |
| 2009 |
110.3 |
0.376 |
| 2010 |
110.9 |
0.377 |
| 2011 |
111.6 |
0.378 |
| 2012 |
112.3 |
0.378 |
| 2013 |
112.9 |
0.379 |
| 2014 |
113.6 |
0.379 |
| 2015 |
114.3 |
0.379 |
| 2016 |
114.9 |
0.380 |
| 2017 |
115.6 |
0.379 |
| 2018 |
116.2 |
0.379 |
| 2019 |
116.9 |
0.379 |
| 2020 |
117.5 |
0.379 |
| 2021 |
118.2 |
0.378 |
| 2022 |
118.9 |
0.378 |
| 2023 |
119.5 |
0.377 |
| 2024 |
120.2 |
0.376 |
| 2025 |
120.9 |
0.375 |
| 2026 |
121.6 |
0.374 |
| 2027 |
122.2 |
0.373 |
| 2028 |
122.9 |
0.372 |
| 2029 |
123.6 |
0.370 |
| 2030 |
124.3 |
0.369 |
|
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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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