12579+4948 HU 641 (HD 233997)
12h 57m 53.94s +49° 48' 16.8" P.A. 300.00 sep 0.1 mag 10.30,10.30 Sp K3III
Coord 2000 |
12579+4948 |
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Discov num |
HU 641 |
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Comp |
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Coord arcsec 2000 |
12 57 53.94 +49 48 16.8 |
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Date first |
1903 |
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Date last |
2007 |
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Obs |
8 |
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Pa first |
190 |
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Pa last |
300.1 |
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P.A. Now (θ) |
300.1° |
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Sep first |
0.4 |
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Sep last |
0.138 |
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Sep. Now (ρ) |
0.138" |
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Mag pri |
10.30 |
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Mag sec |
10.30 |
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delta mag (ΔM) |
0 |
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Spectral class |
K3III (yellow-orange) |
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Pri motion ra |
+002 |
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Sec motion ra |
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Pri motion dec |
-001 |
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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 233997 |
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Constellation |
Canes Venatici |
|
SAO |
28581 |
|
Tycho2 |
3461-02425-1 |
|
Gaia DR2 |
1555775078898034944 |
|
HD |
233997 |
|
ADS |
8718 |
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ORBITAL ELEMENTS
Period (P) | 323.48y | |
Periastron (T) | 1963.41y | |
Semi-major axis (a) | 0.366a | |
Eccentricity (e) | 0.51 | |
Inclination (i) | 140.8° | |
Longitude of periastron (ω) | 357.8° | |
Node (Ω) | 58.3° | |
Notes | n | |
Reference | Erc1986b | |
Equinox | | |
Last observation | 1980 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
319.1 |
0.230 |
2001 |
317.2 |
0.234 |
2002 |
315.4 |
0.238 |
2003 |
313.7 |
0.242 |
2004 |
312.0 |
0.246 |
2005 |
310.4 |
0.250 |
2006 |
308.8 |
0.254 |
2007 |
307.3 |
0.258 |
2008 |
305.8 |
0.262 |
2009 |
304.4 |
0.266 |
2010 |
303.0 |
0.270 |
2011 |
301.7 |
0.274 |
2012 |
300.4 |
0.279 |
2013 |
299.1 |
0.283 |
2014 |
297.9 |
0.287 |
2015 |
296.7 |
0.291 |
2016 |
295.6 |
0.296 |
2017 |
294.4 |
0.300 |
2018 |
293.3 |
0.304 |
2019 |
292.3 |
0.308 |
2020 |
291.3 |
0.313 |
2021 |
290.3 |
0.317 |
2022 |
289.3 |
0.321 |
2023 |
288.3 |
0.325 |
2024 |
287.4 |
0.329 |
2025 |
286.5 |
0.334 |
2026 |
285.6 |
0.338 |
2027 |
284.8 |
0.342 |
2028 |
283.9 |
0.346 |
2029 |
283.1 |
0.350 |
2030 |
282.3 |
0.354 |
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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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