04263+3443 HU 609 (HD 27961)
04h 26m 14.99s +34° 42' 57.8" P.A. 305.00 sep 0.2 mag 9.32,9.00 Sp F5 dist. 180.51 pc (588.82 l.y.)
| Coord 2000 |
04263+3443 |
|
Discov num |
HU 609 |
|
Comp |
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Coord arcsec 2000 |
04 26 14.99 +34 42 57.8 |
|
| Date first |
1902 |
|
Date last |
2008 |
|
Obs |
36 |
|
| Pa first |
11 |
|
Pa last |
305.4 |
|
P.A. Now (θ) |
258.3° |
|
| Sep first |
0.2 |
|
Sep last |
0.18 |
|
Sep. Now (ρ) |
0.192" |
|
| Mag pri |
9.32 |
|
Mag sec |
9.00 |
|
delta mag (ΔM) |
0.32 |
|
Spectral class |
F5 (yellow-white) |
|
| Pri motion ra |
+095 |
|
Sec motion ra |
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|
| Pri motion dec |
-075 |
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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 27961 |
|
Constellation |
Perseus |
|
SAO |
57230 |
|
HIP |
20709 |
|
| Tycho2 |
2380-01896-1 |
|
Gaia DR2 |
176240856256102912 |
|
HD |
27961 |
|
ADS |
3211 |
|
| BD |
BD+34 878 |
|
Distance |
180.51 |
|
Distance ly |
588.82 |
|
ORBITAL ELEMENTS
| Period (P) | 82.38y | |
Periastron (T) | 1978.04y | |
Semi-major axis (a) | 0.231a | |
| Eccentricity (e) | 0.491 | |
Inclination (i) | 122° | |
Longitude of periastron (ω) | 276° | |
| Node (Ω) | 11° | |
Notes | n | |
Reference | Doc2013a | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
329.7 |
0.198 |
| 2001 |
326.9 |
0.196 |
| 2002 |
324.1 |
0.195 |
| 2003 |
321.3 |
0.193 |
| 2004 |
318.3 |
0.191 |
| 2005 |
315.4 |
0.189 |
| 2006 |
312.3 |
0.188 |
| 2007 |
309.3 |
0.186 |
| 2008 |
306.1 |
0.185 |
| 2009 |
303.0 |
0.184 |
| 2010 |
299.8 |
0.183 |
| 2011 |
296.5 |
0.182 |
| 2012 |
293.3 |
0.181 |
| 2013 |
290.0 |
0.181 |
| 2014 |
286.7 |
0.181 |
| 2015 |
283.4 |
0.181 |
| 2016 |
280.1 |
0.182 |
| 2017 |
276.9 |
0.182 |
| 2018 |
273.7 |
0.183 |
| 2019 |
270.5 |
0.185 |
| 2020 |
267.4 |
0.186 |
| 2021 |
264.3 |
0.188 |
| 2022 |
261.3 |
0.190 |
| 2023 |
258.3 |
0.192 |
| 2024 |
255.4 |
0.194 |
| 2025 |
252.6 |
0.197 |
| 2026 |
249.9 |
0.199 |
| 2027 |
247.2 |
0.202 |
| 2028 |
244.6 |
0.204 |
| 2029 |
242.0 |
0.207 |
| 2030 |
239.5 |
0.209 |
|
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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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