09167-0621 KUI  40 (23 Hya)

 
 
09H 16M 41.72S -06 21' 11.4" P.A. 287 SEP 1.4 MAG 5.30,10.80 SP K2III DIST. 75.24 PC (245.43 L.Y.)
 
 
Coord 2000
09167-0621
Discov num
KUI  40
Comp
Coord arcsec 2000
09 16 41.72 -06 21 11.4
Date first
1936
Date last
2015
Obs
15
Pa first
282
Pa last
287
P.A. Now (θ)
287°
Sep first
1.6
Sep last
1.4
Sep. Now (ρ)
1.4"
Mag pri
5.30
Mag sec
10.80
delta mag (ΔM)
5.5
Spectral class
K2III (yellow-orange)
Pri motion ra
+024
Sec motion ra
Pri motion dec
+006
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
287
Precise sep
1.379
Name
23 Hya
Constellation
Hydra
SAO
136725
HIP
45527
Tycho2
4892-01405-1
HD
79910
HR
3681
GC
12800
BD
BD-05 2762
Flamsteed
23 Hydrae
Flamsteed name
23 Hya
Distance
75.24
Distance ly
245.43
last precise pa
287
last precise sep
1.379
 
 
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 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation1991
label rho theta
2000-01-01 0.002 270.9
2001-01-01 0.005 97.0
2002-01-01 0.010 283.9
2003-01-01 0.010 102.5
2004-01-01 0.004 292.1
2005-01-01 0.003 277.2
2006-01-01 0.006 98.0
2007-01-01 0.010 284.2
2008-01-01 0.010 102.9
2009-01-01 0.003 295.5
2010-01-01 0.005 279.4
2011-01-01 0.007 98.8
2012-01-01 0.010 284.6
2013-01-01 0.009 103.3
2014-01-01 0.002 302.0
2015-01-01 0.006 280.5
2016-01-01 0.008 99.5
2017-01-01 0.009 285.0
2018-01-01 0.008 103.7
2019-01-01 0.001 319.9
2020-01-01 0.007 281.3
2021-01-01 0.008 100.0
2022-01-01 0.009 285.4
2023-01-01 0.007 104.3
2024-01-01 0.001 24.5
2025-01-01 0.008 281.8
2026-01-01 0.009 100.4
2027-01-01 0.008 285.9
2028-01-01 0.006 105.1
2029-01-01 0.001 73.0
2030-01-01 0.009 282.3

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic