09183+1847 COU 384

 
 
09h 18m 16.92s +18 46' 51.7" P.A. 235.70 sep 0.2 mag 8.20,8.30 Sp F0 dist. 135.87 pc (443.21 l.y.)
 
 
Coord 2000
09183+1847
Discov num
COU 384
Comp
Coord arcsec 2000
09 18 16.92 +18 46 51.7
Date first
1969
Date last
2012
Obs
19
Pa first
66
Pa last
56
P.A. Now (θ)
235.7°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.16"
Mag pri
8.20
Mag sec
8.30
delta mag (ΔM)
0.1
Spectral class
F0 (yellow-white)
Pri motion ra
-010
Sec motion ra
Pri motion dec
-014
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
55.9
Precise sep
0.185
Constellation
Hydra
SAO
98481
HIP
45648
Tycho2
1405-00099-1
Gaia DR2
635614035496860288
HD
80082
BD
BD+19 2194
Distance
135.87
Distance ly
443.21
last precise pa
55.9
last precise sep
0.185
 
 
ORBITAL ELEMENTS
 
 
Period (P)40.43y± 0.38 Periastron (T)1999.33y± 0.14 Semi-major axis (a)0.1475a± 0.0003
Eccentricity (e)0.379± 0.004 Inclination (i)96.83°± 0.15 Longitude of periastron (ω)31.3°± 1.9
Node (Ω)60.96°± 0.11 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.065 54.1
2001 0.041 46.1
2002 0.016 12.4
2003 0.023 275.6
2004 0.049 256.4
2005 0.075 250.7
2006 0.098 247.8
2007 0.119 246.0
2008 0.137 244.7
2009 0.152 243.7
2010 0.165 242.8
2011 0.175 242.1
2012 0.183 241.4
2013 0.188 240.8
2014 0.191 240.2
2015 0.192 239.6
2016 0.192 239.0
2017 0.189 238.5
2018 0.184 237.8
2019 0.178 237.2
2020 0.171 236.5
2021 0.161 235.7
2022 0.150 234.8
2023 0.138 233.8
2024 0.125 232.6
2025 0.110 231.0
2026 0.094 229.0
2027 0.078 226.1
2028 0.060 221.5
2029 0.043 213.2
2030 0.027 194.2


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



 
 


wds09183%2B1847a.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
09183+1847 COU 384 1997 18 75 0.1 8.20 8.30 F0 091816.92+184651.7

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