13482+2248 COU 401 (HD 120280)
13h 48m 09.21s +22° 48' 06.0" P.A. 7.00 sep 0.3 mag 9.50,10.60 Sp G0+G8 dist. 167.5 pc (546.38 l.y.)
Coord 2000 |
13482+2248 |
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Discov num |
COU 401 |
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Comp |
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Coord arcsec 2000 |
13 48 09.21 +22 48 06.0 |
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Date first |
1969 |
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Date last |
2017 |
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Obs |
13 |
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Pa first |
45 |
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Pa last |
6.7 |
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P.A. Now (θ) |
6.7° |
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Sep first |
0.2 |
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Sep last |
0.331 |
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Sep. Now (ρ) |
0.331" |
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Mag pri |
9.50 |
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Mag sec |
10.60 |
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delta mag (ΔM) |
1.1 |
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Spectral class |
G0+G8 (yellow/yellow) |
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Pri motion ra |
-014 |
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Sec motion ra |
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Pri motion dec |
+014 |
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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
Name |
HD 120280 |
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Constellation |
Bootes |
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SAO |
82998 |
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HIP |
67342 |
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Tycho2 |
1999-00276-1 |
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Gaia DR2 |
1251360613138794880 |
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HD |
120280 |
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BD |
BD+23 2615 |
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Distance |
167.5 |
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Distance ly |
546.38 |
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ORBITAL ELEMENTS
Period (P) | 98.7y | ± 1 |
Periastron (T) | 2007.42y | ± 0.02 |
Semi-major axis (a) | 0.401a | ± 0.005 |
Eccentricity (e) | 0.7 | ± 0.01 |
Inclination (i) | 76.8° | ± 2 |
Longitude of periastron (ω) | 70.9° | ± 5 |
Node (Ω) | 165.4° | ± 3 |
Notes | n | |
Reference | Doc2010h | |
Equinox | 2000 | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
154.6 |
0.213 |
2001 |
156.7 |
0.209 |
2002 |
159.0 |
0.202 |
2003 |
161.5 |
0.191 |
2004 |
164.3 |
0.174 |
2005 |
168.0 |
0.148 |
2006 |
173.6 |
0.113 |
2007 |
186.1 |
0.067 |
2008 |
244.5 |
0.028 |
2009 |
317.4 |
0.060 |
2010 |
331.8 |
0.109 |
2011 |
337.5 |
0.154 |
2012 |
340.7 |
0.192 |
2013 |
342.9 |
0.224 |
2014 |
344.6 |
0.252 |
2015 |
346.0 |
0.276 |
2016 |
347.2 |
0.296 |
2017 |
348.2 |
0.314 |
2018 |
349.1 |
0.329 |
2019 |
350.0 |
0.342 |
2020 |
350.8 |
0.354 |
2021 |
351.5 |
0.364 |
2022 |
352.2 |
0.372 |
2023 |
352.9 |
0.379 |
2024 |
353.5 |
0.385 |
2025 |
354.2 |
0.390 |
2026 |
354.8 |
0.394 |
2027 |
355.4 |
0.397 |
2028 |
356.0 |
0.399 |
2029 |
356.6 |
0.400 |
2030 |
357.2 |
0.401 |
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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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