04357+3944 HU 1084 (HD 28989)
04h 35m 41.01s +39° 44' 04.2" P.A. 76.00 sep 0.2 mag 8.93,9.24 Sp F5 dist. 126.74 pc (413.43 l.y.)
| Coord 2000 |
04357+3944 |
|
Discov num |
HU 1084 |
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Comp |
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Coord arcsec 2000 |
04 35 41.01 +39 44 04.2 |
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| Date first |
1904 |
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Date last |
2008 |
|
Obs |
26 |
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| Pa first |
44 |
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Pa last |
75.9 |
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P.A. Now (θ) |
75.9° |
|
| Sep first |
0.7 |
|
Sep last |
0.24 |
|
Sep. Now (ρ) |
0.24" |
|
| Mag pri |
8.93 |
|
Mag sec |
9.24 |
|
delta mag (ΔM) |
0.31 |
|
Spectral class |
F5 (yellow-white) |
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| Pri motion ra |
+003 |
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Sec motion ra |
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| Pri motion dec |
-004 |
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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
| Name |
HD 28989 |
|
Constellation |
Perseus |
|
SAO |
57326 |
|
HIP |
21405 |
|
| Tycho2 |
2884-00891-1 |
|
HD |
28989 |
|
ADS |
3315 |
|
BD |
BD+39 1030 |
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| Distance |
126.74 |
|
Distance ly |
413.43 |
|
ORBITAL ELEMENTS
| Period (P) | 488y | ± 96 |
Periastron (T) | 1966y | ± 2.16 |
Semi-major axis (a) | 0.681a | ± 0.017 |
| Eccentricity (e) | 0.894 | ± 0.002 |
Inclination (i) | 105.9° | ± 1.6 |
Longitude of periastron (ω) | 137.9° | ± 8 |
| Node (Ω) | 34.9° | ± 2.8 |
Notes | | |
Reference | Lin2012a | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
84.1 |
0.182 |
| 2001 |
82.9 |
0.189 |
| 2002 |
81.8 |
0.195 |
| 2003 |
80.7 |
0.202 |
| 2004 |
79.7 |
0.208 |
| 2005 |
78.8 |
0.215 |
| 2006 |
77.9 |
0.222 |
| 2007 |
77.1 |
0.228 |
| 2008 |
76.3 |
0.235 |
| 2009 |
75.5 |
0.241 |
| 2010 |
74.8 |
0.248 |
| 2011 |
74.2 |
0.254 |
| 2012 |
73.5 |
0.261 |
| 2013 |
72.9 |
0.267 |
| 2014 |
72.3 |
0.273 |
| 2015 |
71.8 |
0.280 |
| 2016 |
71.3 |
0.286 |
| 2017 |
70.8 |
0.292 |
| 2018 |
70.3 |
0.299 |
| 2019 |
69.8 |
0.305 |
| 2020 |
69.4 |
0.311 |
| 2021 |
69.0 |
0.317 |
| 2022 |
68.5 |
0.323 |
| 2023 |
68.2 |
0.330 |
| 2024 |
67.8 |
0.336 |
| 2025 |
67.4 |
0.342 |
| 2026 |
67.1 |
0.348 |
| 2027 |
66.7 |
0.354 |
| 2028 |
66.4 |
0.360 |
| 2029 |
66.1 |
0.366 |
| 2030 |
65.8 |
0.372 |
|
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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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