04275+1113 BU 1186 (HD 28217)
04h 27m 28.77s +11° 12' 44.4" P.A. 78.00 sep 0.1 mag 6.07,7.94 Sp B8IV dist. 180.18 pc (587.75 l.y.)
Coord 2000 |
04275+1113 |
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Discov num |
BU 1186 |
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Comp |
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Coord arcsec 2000 |
04 27 28.77 +11 12 44.4 |
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Date first |
1890 |
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Date last |
1996 |
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Obs |
41 |
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Pa first |
182 |
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Pa last |
78.1 |
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P.A. Now (θ) |
78.1° |
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Sep first |
0.6 |
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Sep last |
0.127 |
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Sep. Now (ρ) |
0.127" |
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Mag pri |
6.07 |
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Mag sec |
7.94 |
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delta mag (ΔM) |
1.87 |
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Spectral class |
B8IV (blue-white) |
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Pri motion ra |
-005 |
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Sec motion ra |
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Pri motion dec |
-008 |
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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 28217 |
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Constellation |
Taurus |
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SAO |
93943 |
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HIP |
20804 |
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Tycho2 |
0672-01283-1 |
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Gaia DR2 |
3306058021059565568 |
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HD |
28217 |
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HR |
1402 |
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GC |
5408 |
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ADS |
3228 |
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BD |
BD+10 577 |
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Distance |
180.18 |
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Distance ly |
587.75 |
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ORBITAL ELEMENTS
Period (P) | 160.59y | |
Periastron (T) | 2005.8y | |
Semi-major axis (a) | 0.401a | |
Eccentricity (e) | 0.74 | |
Inclination (i) | 118.6° | |
Longitude of periastron (ω) | 27.3° | |
Node (Ω) | 5.4° | |
Notes | n | |
Reference | Ole2005a | |
Equinox | 2000 | |
Last observation | 1996 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
45.2 |
0.114 |
2001 |
36.4 |
0.115 |
2002 |
27.8 |
0.116 |
2003 |
19.2 |
0.116 |
2004 |
10.4 |
0.113 |
2005 |
0.7 |
0.105 |
2006 |
348.9 |
0.093 |
2007 |
332.7 |
0.077 |
2008 |
309.4 |
0.065 |
2009 |
280.5 |
0.064 |
2010 |
255.4 |
0.075 |
2011 |
238.5 |
0.093 |
2012 |
227.7 |
0.115 |
2013 |
220.3 |
0.138 |
2014 |
215.1 |
0.160 |
2015 |
211.1 |
0.183 |
2016 |
208.0 |
0.204 |
2017 |
205.5 |
0.225 |
2018 |
203.4 |
0.244 |
2019 |
201.6 |
0.263 |
2020 |
200.0 |
0.282 |
2021 |
198.6 |
0.299 |
2022 |
197.4 |
0.316 |
2023 |
196.3 |
0.332 |
2024 |
195.3 |
0.347 |
2025 |
194.4 |
0.362 |
2026 |
193.5 |
0.376 |
2027 |
192.7 |
0.390 |
2028 |
192.0 |
0.403 |
2029 |
191.3 |
0.416 |
2030 |
190.6 |
0.428 |
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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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