15186+2356 COU 307
15h 18m 34.84s +23° 56' 42.8" P.A. 358.00 sep 0.3 mag 9.50,9.60 Sp G0
Coord 2000 |
15186+2356 |
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Discov num |
COU 307 |
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Comp |
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Coord arcsec 2000 |
15 18 34.84 +23 56 42.8 |
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Date first |
1968 |
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Date last |
2014 |
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Obs |
26 |
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Pa first |
64 |
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Pa last |
358.3 |
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P.A. Now (θ) |
358.3° |
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Sep first |
0.2 |
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Sep last |
0.304 |
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Sep. Now (ρ) |
0.304" |
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Mag pri |
9.50 |
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Mag sec |
9.60 |
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delta mag (ΔM) |
0.1 |
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Spectral class |
G0 (yellow) |
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Pri motion ra |
-002 |
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Sec motion ra |
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Pri motion dec |
+061 |
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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 |
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Tycho2 |
2025-00994-1 |
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ORBITAL ELEMENTS
Period (P) | 300y | |
Periastron (T) | 1964.7y | |
Semi-major axis (a) | 0.597a | |
Eccentricity (e) | 0.76 | |
Inclination (i) | 117.6° | |
Longitude of periastron (ω) | 288.4° | |
Node (Ω) | 59.1° | |
Notes | | |
Reference | Lin2017c | |
Equinox | 2000 | |
Last observation | 2017 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
14.2 |
0.336 |
2001 |
13.1 |
0.337 |
2002 |
12.0 |
0.339 |
2003 |
10.8 |
0.340 |
2004 |
9.7 |
0.342 |
2005 |
8.6 |
0.343 |
2006 |
7.6 |
0.345 |
2007 |
6.5 |
0.346 |
2008 |
5.4 |
0.348 |
2009 |
4.3 |
0.349 |
2010 |
3.3 |
0.351 |
2011 |
2.2 |
0.352 |
2012 |
1.2 |
0.354 |
2013 |
0.2 |
0.355 |
2014 |
359.2 |
0.357 |
2015 |
358.2 |
0.358 |
2016 |
357.2 |
0.360 |
2017 |
356.2 |
0.361 |
2018 |
355.2 |
0.363 |
2019 |
354.2 |
0.364 |
2020 |
353.2 |
0.366 |
2021 |
352.3 |
0.367 |
2022 |
351.3 |
0.369 |
2023 |
350.4 |
0.371 |
2024 |
349.5 |
0.372 |
2025 |
348.5 |
0.374 |
2026 |
347.6 |
0.376 |
2027 |
346.7 |
0.377 |
2028 |
345.8 |
0.379 |
2029 |
344.9 |
0.381 |
2030 |
344.0 |
0.383 |
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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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