15465+1957 COU 66
15h 46m 32.45s +19° 57' 14.4" P.A. 67.00 sep 0.5 mag 10.94,11.20 Sp K8 dist. 49.02 pc (159.9 l.y.)
| Coord 2000 |
15465+1957 |
|
Discov num |
COU 66 |
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Comp |
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Coord arcsec 2000 |
15 46 32.45 +19 57 14.4 |
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| Date first |
1965 |
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Date last |
2018 |
|
Obs |
37 |
|
| Pa first |
164 |
|
Pa last |
67.4 |
|
P.A. Now (θ) |
67.4° |
|
| Sep first |
0.9 |
|
Sep last |
0.468 |
|
Sep. Now (ρ) |
0.468" |
|
| Mag pri |
10.94 |
|
Mag sec |
11.20 |
|
delta mag (ΔM) |
0.26 |
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Spectral class |
K8 (yellow-orange) |
|
| Pri motion ra |
-163 |
|
Sec motion ra |
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| Pri motion dec |
+143 |
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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
| Constellation |
Serpens |
|
HIP |
77269 |
|
Tycho2 |
1498-01207-3 |
|
Distance |
49.02 |
|
| Distance ly |
159.9 |
|
ORBITAL ELEMENTS
| Period (P) | 143.2y | ± 3.3 |
Periastron (T) | 2031.3y | ± 3.8 |
Semi-major axis (a) | 0.727a | ± 0.011 |
| Eccentricity (e) | 0.497 | ± 0.019 |
Inclination (i) | 147° | ± 0.4 |
Longitude of periastron (ω) | 25.5° | ± 4 |
| Node (Ω) | 12° | ± 5.1 |
Notes | | |
Reference | Ksr2021 | |
| Equinox | | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
122.4 |
0.706 |
| 2001 |
120.5 |
0.692 |
| 2002 |
118.4 |
0.678 |
| 2003 |
116.2 |
0.664 |
| 2004 |
114.0 |
0.650 |
| 2005 |
111.7 |
0.636 |
| 2006 |
109.2 |
0.622 |
| 2007 |
106.7 |
0.608 |
| 2008 |
104.0 |
0.594 |
| 2009 |
101.2 |
0.580 |
| 2010 |
98.2 |
0.566 |
| 2011 |
95.2 |
0.553 |
| 2012 |
91.9 |
0.540 |
| 2013 |
88.5 |
0.527 |
| 2014 |
84.9 |
0.514 |
| 2015 |
81.2 |
0.502 |
| 2016 |
77.3 |
0.490 |
| 2017 |
73.1 |
0.479 |
| 2018 |
68.8 |
0.468 |
| 2019 |
64.3 |
0.457 |
| 2020 |
59.6 |
0.448 |
| 2021 |
54.7 |
0.438 |
| 2022 |
49.5 |
0.429 |
| 2023 |
44.2 |
0.420 |
| 2024 |
38.6 |
0.412 |
| 2025 |
32.8 |
0.404 |
| 2026 |
26.7 |
0.396 |
| 2027 |
20.4 |
0.388 |
| 2028 |
13.9 |
0.380 |
| 2029 |
7.0 |
0.372 |
| 2030 |
359.9 |
0.365 |
|
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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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