15493+6032 HU 912 (HD 142089)
15h 49m 15.70s +60° 31' 38.5" P.A. 141.00 sep 0.3 mag 8.60,9.01 Sp F5 dist. 94.07 pc (306.86 l.y.)
Coord 2000 |
15493+6032 |
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Discov num |
HU 912 |
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Comp |
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Coord arcsec 2000 |
15 49 15.70 +60 31 38.5 |
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Date first |
1905 |
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Date last |
2014 |
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Obs |
60 |
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Pa first |
138 |
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Pa last |
141 |
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P.A. Now (θ) |
148.9° |
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Sep first |
0.3 |
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Sep last |
0.325 |
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Sep. Now (ρ) |
0.34" |
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Mag pri |
8.60 |
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Mag sec |
9.01 |
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delta mag (ΔM) |
0.41 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
-091 |
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Sec motion ra |
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Pri motion dec |
+021 |
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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 142089 |
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Constellation |
Draco |
|
SAO |
16860 |
|
HIP |
77482 |
|
Tycho2 |
4182-00450-1 |
|
HD |
142089 |
|
ADS |
9806 |
|
BD |
BD+60 1637 |
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Distance |
94.07 |
|
Distance ly |
306.86 |
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ORBITAL ELEMENTS
Period (P) | 109y | |
Periastron (T) | 1988.5y | |
Semi-major axis (a) | 0.32a | |
Eccentricity (e) | 0.67 | |
Inclination (i) | 54° | |
Longitude of periastron (ω) | 260° | |
Node (Ω) | 102° | |
Notes | n | |
Reference | Hei1996c | |
Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
114.0 |
0.255 |
2001 |
116.2 |
0.264 |
2002 |
118.2 |
0.273 |
2003 |
120.2 |
0.281 |
2004 |
122.0 |
0.288 |
2005 |
123.7 |
0.295 |
2006 |
125.4 |
0.300 |
2007 |
127.0 |
0.306 |
2008 |
128.6 |
0.310 |
2009 |
130.1 |
0.315 |
2010 |
131.5 |
0.318 |
2011 |
133.0 |
0.322 |
2012 |
134.4 |
0.325 |
2013 |
135.8 |
0.328 |
2014 |
137.1 |
0.330 |
2015 |
138.5 |
0.332 |
2016 |
139.8 |
0.334 |
2017 |
141.1 |
0.335 |
2018 |
142.4 |
0.337 |
2019 |
143.7 |
0.338 |
2020 |
145.0 |
0.339 |
2021 |
146.3 |
0.339 |
2022 |
147.6 |
0.340 |
2023 |
148.9 |
0.340 |
2024 |
150.2 |
0.340 |
2025 |
151.4 |
0.340 |
2026 |
152.7 |
0.340 |
2027 |
154.0 |
0.340 |
2028 |
155.3 |
0.339 |
2029 |
156.5 |
0.339 |
2030 |
157.8 |
0.338 |
2031 |
159.1 |
0.337 |
2032 |
160.4 |
0.337 |
2033 |
161.7 |
0.336 |
2034 |
163.0 |
0.335 |
2035 |
164.4 |
0.334 |
2036 |
165.7 |
0.333 |
2037 |
167.0 |
0.331 |
2038 |
168.4 |
0.330 |
2039 |
169.7 |
0.329 |
2040 |
171.1 |
0.327 |
2041 |
172.5 |
0.326 |
2042 |
173.9 |
0.324 |
2043 |
175.3 |
0.323 |
2044 |
176.7 |
0.321 |
2045 |
178.2 |
0.320 |
2046 |
179.6 |
0.318 |
2047 |
181.1 |
0.317 |
2048 |
182.6 |
0.315 |
2049 |
184.0 |
0.313 |
2050 |
185.6 |
0.312 |
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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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