18171-4336 HDS2583

 
 
18H 17M 03.81S -43 35' 41.3" P.A. 23.6 SEP 0.04 MAG 8.88,9.95 SP G8/K0III+ DIST. 395.26 PC (1289.34 L.Y.)
 
 
Coord 2000
18171-4336
Discov num
HDS2583
Comp
Coord arcsec 2000
18 17 03.81 -43 35 41.3
Date first
1991
Date last
2015
Obs
7
Pa first
190
Pa last
64
P.A. Now (θ)
23.6°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.04"
Mag pri
8.88
Mag sec
9.95
delta mag (ΔM)
1.07
Spectral class
G8/K0III+ (yellow)
Pri motion ra
+005
Sec motion ra
Pri motion dec
-010
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Corona Austrina
SAO
228868
HIP
89599
Tycho2
7912-00277-1
HD
167384
CD
CD-4312414
CP
CP-43 8532
Distance
395.26
Distance ly
1289.34
last precise pa
63.5
last precise sep
0.051
 
 
ORBITAL ELEMENTS
 
 
Period (P)153.9y± 308.47 Periastron (T)2016.88y± 2.38 Semi-major axis (a)0.153a± 0.082
Eccentricity (e)0.724± 0.025 Inclination (i)129.9°± 44 Longitude of periastron (ω)24.2°± 81
Node (Ω)58.5°± 15.5 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.090 171.3
2001 0.086 168.2
2002 0.081 164.8
2003 0.077 160.9
2004 0.073 156.6
2005 0.069 151.7
2006 0.065 146.3
2007 0.061 140.2
2008 0.058 133.4
2009 0.055 125.9
2010 0.053 117.6
2011 0.051 108.6
2012 0.050 99.0
2013 0.048 88.9
2014 0.047 78.3
2015 0.046 67.1
2016 0.043 54.8
2017 0.040 40.6
2018 0.036 23.6
2019 0.034 3.5
2020 0.034 342.1
2021 0.037 322.8
2022 0.043 307.6
2023 0.050 296.2
2024 0.057 287.7
2025 0.065 281.3
2026 0.073 276.2
2027 0.081 272.0
2028 0.088 268.6
2029 0.095 265.7
2030 0.102 263.2

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