09167-0621 KUI 40 (23 Hya)
09h 16m 41.72s -06° 21' 11.4" P.A. 287.00 sep 1.3 mag 5.30,10.80 Sp K2III dist. 75.24 pc (245.43 l.y.)
Coord 2000 |
09167-0621 |
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Discov num |
KUI 40 |
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Comp |
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Coord arcsec 2000 |
09 16 41.72 -06 21 11.4 |
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Date first |
1936 |
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Date last |
2019 |
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Obs |
26 |
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Pa first |
282 |
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Pa last |
287.4 |
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P.A. Now (θ) |
287.4° |
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Sep first |
1.6 |
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Sep last |
1.34 |
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Sep. Now (ρ) |
1.34" |
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Mag pri |
5.30 |
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Mag sec |
10.80 |
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delta mag (ΔM) |
5.5 |
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Spectral class |
K2III (yellow-orange) |
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Pri motion ra |
+024 |
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Sec motion ra |
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Pri motion dec |
+006 |
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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 |
23 Hya |
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Constellation |
Hydra |
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SAO |
136725 |
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HIP |
45527 |
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Tycho2 |
4892-01405-1 |
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Gaia DR2 |
5746003103393343232 |
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HD |
79910 |
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HR |
3681 |
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GC |
12800 |
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BD |
BD-05 2762 |
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Flamsteed |
23 Hydrae |
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Flamsteed name |
23 Hya |
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FK5 |
2739 |
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Distance |
75.24 |
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Distance ly |
245.43 |
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ORBITAL ELEMENTS
Period (P) | 922d (2.52y) | |
Periastron (T) | 48797.8516d (1992.48y) | ± 25.6477 |
Semi-major axis (a) | 10.64m | ± 2.79 |
Eccentricity (e) | 0.293 | |
Inclination (i) | 92.6° | ± 4.66 |
Longitude of periastron (ω) | 92.27° | |
Node (Ω) | 282.8° | ± 5.28 |
Notes | n | |
Reference | HIP1997d | |
Equinox | | |
Last observation | 1991 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
270.9 |
0.002 |
2001-01-01 |
97.0 |
0.005 |
2002-01-01 |
283.9 |
0.010 |
2003-01-01 |
102.5 |
0.010 |
2004-01-01 |
292.1 |
0.004 |
2005-01-01 |
277.2 |
0.003 |
2006-01-01 |
98.0 |
0.006 |
2007-01-01 |
284.2 |
0.010 |
2008-01-01 |
102.9 |
0.010 |
2009-01-01 |
295.5 |
0.003 |
2010-01-01 |
279.4 |
0.005 |
2011-01-01 |
98.8 |
0.007 |
2012-01-01 |
284.6 |
0.010 |
2013-01-01 |
103.3 |
0.009 |
2014-01-01 |
302.0 |
0.002 |
2015-01-01 |
280.5 |
0.006 |
2016-01-01 |
99.5 |
0.008 |
2017-01-01 |
285.0 |
0.009 |
2018-01-01 |
103.7 |
0.008 |
2019-01-01 |
319.9 |
0.001 |
2020-01-01 |
281.3 |
0.007 |
2021-01-01 |
100.0 |
0.008 |
2022-01-01 |
285.4 |
0.009 |
2023-01-01 |
104.3 |
0.007 |
2024-01-01 |
24.5 |
0.001 |
2025-01-01 |
281.8 |
0.008 |
2026-01-01 |
100.4 |
0.009 |
2027-01-01 |
285.9 |
0.008 |
2028-01-01 |
105.1 |
0.006 |
2029-01-01 |
73.0 |
0.001 |
2030-01-01 |
282.3 |
0.009 |
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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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