13331+4316 COU 1754
13h 33m 08.21s +43° 15' 10.2" P.A. 163.00 sep 0.3 mag 10.18,10.21 Sp K8V dist. 32.59 pc (106.31 l.y.)
Coord 2000 |
13331+4316 |
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Discov num |
COU1754 |
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Comp |
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Coord arcsec 2000 |
13 33 08.21 +43 15 10.2 |
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Date first |
1979 |
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Date last |
2014 |
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Obs |
18 |
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Pa first |
162 |
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Pa last |
162.7 |
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P.A. Now (θ) |
162.7° |
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Sep first |
0.7 |
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Sep last |
0.26 |
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Sep. Now (ρ) |
0.26" |
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Mag pri |
10.18 |
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Mag sec |
10.21 |
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delta mag (ΔM) |
0.03 |
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Spectral class |
K8V (yellow-orange) |
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Pri motion ra |
+022 |
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Sec motion ra |
+022 |
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Pri motion dec |
-044 |
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Sec motion dec |
-044 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Canes Venatici |
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HIP |
66110 |
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Tycho2 |
3031-00536-1 |
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Gaia DR2 |
1501385640285547520 |
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BD |
BD+44 2279 |
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Distance |
32.59 |
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Distance ly |
106.31 |
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ORBITAL ELEMENTS
Period (P) | 125.5y | ± 2 |
Periastron (T) | 2056.4y | ± 1.2 |
Semi-major axis (a) | 0.6254a | ± 0.0059 |
Eccentricity (e) | 0.189 | ± 0.018 |
Inclination (i) | 94.865° | ± 0.073 |
Longitude of periastron (ω) | 230.13° | ± 0.21 |
Node (Ω) | 171.25° | ± 0.34 |
Notes | | |
Reference | Hor2021b | |
Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
161.9 |
0.342 |
2001 |
161.0 |
0.319 |
2002 |
160.0 |
0.295 |
2003 |
158.8 |
0.271 |
2004 |
157.4 |
0.246 |
2005 |
155.7 |
0.221 |
2006 |
153.6 |
0.196 |
2007 |
150.8 |
0.172 |
2008 |
147.1 |
0.147 |
2009 |
141.9 |
0.123 |
2010 |
134.4 |
0.101 |
2011 |
122.8 |
0.080 |
2012 |
104.8 |
0.066 |
2013 |
80.2 |
0.060 |
2014 |
55.7 |
0.066 |
2015 |
37.9 |
0.081 |
2016 |
26.5 |
0.101 |
2017 |
19.0 |
0.124 |
2018 |
13.9 |
0.148 |
2019 |
10.2 |
0.172 |
2020 |
7.4 |
0.197 |
2021 |
5.3 |
0.221 |
2022 |
3.6 |
0.246 |
2023 |
2.2 |
0.270 |
2024 |
1.0 |
0.293 |
2025 |
360.0 |
0.317 |
2026 |
359.1 |
0.339 |
2027 |
358.4 |
0.361 |
2028 |
357.7 |
0.382 |
2029 |
357.1 |
0.402 |
2030 |
356.5 |
0.421 |
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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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