12017+4728 COU 1752
12h 01m 44.12s +47° 27' 50.8" P.A. 112.00 sep 0.1 mag 9.58,10.66 Sp F8 dist. 114.16 pc (372.39 l.y.)
| Coord 2000 |
12017+4728 |
|
Discov num |
COU1752 |
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Comp |
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Coord arcsec 2000 |
12 01 44.12 +47 27 50.8 |
|
| Date first |
1980 |
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Date last |
2012 |
|
Obs |
14 |
|
| Pa first |
63 |
|
Pa last |
112.4 |
|
P.A. Now (θ) |
112.4° |
|
| Sep first |
0.1 |
|
Sep last |
0.12 |
|
Sep. Now (ρ) |
0.12" |
|
| Mag pri |
9.58 |
|
Mag sec |
10.66 |
|
delta mag (ΔM) |
1.08 |
|
Spectral class |
F8 (yellow-white) |
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| Pri motion ra |
-075 |
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Sec motion ra |
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| Pri motion dec |
-001 |
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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 |
Ursa Major |
|
HIP |
58659 |
|
Tycho2 |
3455-00257-1 |
|
Gaia DR2 |
1540177613104250496 |
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| BD |
BD+48 1992 |
|
Distance |
114.16 |
|
Distance ly |
372.39 |
|
ORBITAL ELEMENTS
| Period (P) | 71.4y | ± 8 |
Periastron (T) | 2006.4y | ± 0.3 |
Semi-major axis (a) | 0.182a | ± 0.019 |
| Eccentricity (e) | 0.477 | ± 0.051 |
Inclination (i) | 50.3° | ± 3.4 |
Longitude of periastron (ω) | 83.6° | ± 10.8 |
| Node (Ω) | 125.6° | ± 7.6 |
Notes | | |
Reference | Ksr2021 | |
| Equinox | | |
Last observation | 2012 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
126.8 |
0.132 |
| 2001 |
132.6 |
0.122 |
| 2002 |
139.5 |
0.111 |
| 2003 |
148.2 |
0.098 |
| 2004 |
159.5 |
0.085 |
| 2005 |
175.0 |
0.072 |
| 2006 |
195.9 |
0.063 |
| 2007 |
220.7 |
0.061 |
| 2008 |
243.9 |
0.067 |
| 2009 |
261.7 |
0.079 |
| 2010 |
274.5 |
0.093 |
| 2011 |
284.0 |
0.107 |
| 2012 |
291.3 |
0.120 |
| 2013 |
297.2 |
0.131 |
| 2014 |
302.3 |
0.142 |
| 2015 |
306.7 |
0.151 |
| 2016 |
310.6 |
0.158 |
| 2017 |
314.2 |
0.165 |
| 2018 |
317.5 |
0.170 |
| 2019 |
320.7 |
0.175 |
| 2020 |
323.7 |
0.179 |
| 2021 |
326.5 |
0.182 |
| 2022 |
329.3 |
0.184 |
| 2023 |
332.1 |
0.186 |
| 2024 |
334.8 |
0.187 |
| 2025 |
337.4 |
0.188 |
| 2026 |
340.1 |
0.188 |
| 2027 |
342.7 |
0.188 |
| 2028 |
345.4 |
0.188 |
| 2029 |
348.0 |
0.188 |
| 2030 |
350.7 |
0.187 |
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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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