09124-0707 GAA   7 (21 Hya)

 
 
09h 12m 26.05s -07 06' 35.3" P.A. 73.00 mag 6.10,6.50 Sp A0m dist. 86.73 pc (282.91 l.y.)
 
 
Coord 2000
09124-0707
Discov num
GAA   7
Comp
Coord arcsec 2000
09 12 26.05 -07 06 35.3
Date first
2016
Date last
2017
Obs
6
Pa first
77
Pa last
73
P.A. Now (θ)
73°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
Mag pri
6.10
Mag sec
6.50
delta mag (ΔM)
0.4
Spectral class
A0m (white)
Pri motion ra
-019
Sec motion ra
Pri motion dec
+010
Sec motion dec
Notes
N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
73.2
Precise sep
0.001
Name
21 Hya
Var name
KW Hya
Constellation
Hydra
SAO
136662
HIP
45184
Tycho2
4891-01371-1
HD
79193
HR
3655
GC
12704
BD
BD-06 2845
Flamsteed
21 Hydrae
Flamsteed name
21 Hya
Distance
86.73
Distance ly
282.91
last precise pa
73.2
last precise sep
0.001
 
 
ORBITAL ELEMENTS
 
 
Period (P)7.750468d± 0.000006 Periastron (T)24.421d (1858.943y)± 0.032 Semi-major axis (a)1.329m± 0.007
Eccentricity (e)0.094± 0.004 Inclination (i)92.5°± 0.26 Longitude of periastron (ω)225.38°± 1.6
Node (Ω)75.76°± 0.11 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.001 76.0
2001 0.001 74.1
2002 68.3
2003 0.001 262.1
2004 0.001 256.8
2005 0.001 254.4
2006 235.8
2007 0.001 78.5
2008 0.001 76.0
2009 0.001 74.1
2010 68.1
2011 0.001 261.9
2012 0.001 256.8
2013 0.001 254.3
2014 234.0
2015 0.001 78.4
2016 0.001 75.9
2017 0.001 74.0
2018 67.9
2019 0.001 261.8
2020 0.001 256.8
2021 0.001 254.3
2022 231.9
2023 0.001 78.4
2024 0.001 75.9
2025 0.001 74.0
2026 67.7
2027 0.001 261.6
2028 0.001 256.7
2029 0.001 254.3
2030 229.4


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



 
 


wds09124-0707a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
09124-0707 GAA 7 2017 6 73 0.0 6.10 6.50 A0m NO K 091226.05-070635.3

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