14593+4649 COU 1760 (ET Boo)
14h 59m 20.35s +46° 49' 03.5" P.A. 249.00 sep 0.2 mag 9.61,10.47 Sp F8 dist. 183.49 pc (598.54 l.y.)
| Coord 2000 |
14593+4649 |
|
Discov num |
COU1760 |
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Comp |
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Coord arcsec 2000 |
14 59 20.35 +46 49 03.5 |
|
| Date first |
1978 |
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Date last |
2011 |
|
Obs |
29 |
|
| Pa first |
187 |
|
Pa last |
249 |
|
P.A. Now (θ) |
249° |
|
| Sep first |
0.1 |
|
Sep last |
0.216 |
|
Sep. Now (ρ) |
0.216" |
|
| Mag pri |
9.61 |
|
Mag sec |
10.47 |
|
delta mag (ΔM) |
0.86 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
-024 |
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Sec motion ra |
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| Pri motion dec |
-004 |
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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
| Var name |
ET Boo |
|
Constellation |
Bootes |
|
HIP |
73346 |
|
Tycho2 |
3474-00299-1 |
|
| Gaia DR2 |
1587395899441029760 |
|
BD |
BD+47 2190 |
|
Distance |
183.49 |
|
Distance ly |
598.54 |
|
ORBITAL ELEMENTS
| Period (P) | 251.7y | |
Periastron (T) | 1975.23y | |
Semi-major axis (a) | 0.54a | |
| Eccentricity (e) | 0.811 | |
Inclination (i) | 70.6° | |
Longitude of periastron (ω) | 291.5° | |
| Node (Ω) | 187° | |
Notes | | |
Reference | Hrt2014b | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
229.9 |
0.218 |
| 2001 |
231.6 |
0.218 |
| 2002 |
233.3 |
0.218 |
| 2003 |
235.0 |
0.218 |
| 2004 |
236.7 |
0.219 |
| 2005 |
238.4 |
0.219 |
| 2006 |
240.0 |
0.219 |
| 2007 |
241.7 |
0.220 |
| 2008 |
243.4 |
0.220 |
| 2009 |
245.1 |
0.220 |
| 2010 |
246.7 |
0.221 |
| 2011 |
248.4 |
0.222 |
| 2012 |
250.0 |
0.222 |
| 2013 |
251.7 |
0.223 |
| 2014 |
253.3 |
0.224 |
| 2015 |
254.9 |
0.225 |
| 2016 |
256.5 |
0.226 |
| 2017 |
258.1 |
0.227 |
| 2018 |
259.6 |
0.228 |
| 2019 |
261.2 |
0.230 |
| 2020 |
262.7 |
0.231 |
| 2021 |
264.2 |
0.233 |
| 2022 |
265.7 |
0.234 |
| 2023 |
267.2 |
0.236 |
| 2024 |
268.6 |
0.238 |
| 2025 |
270.1 |
0.239 |
| 2026 |
271.5 |
0.241 |
| 2027 |
272.8 |
0.243 |
| 2028 |
274.2 |
0.245 |
| 2029 |
275.5 |
0.248 |
| 2030 |
276.8 |
0.250 |
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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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