18594-1250 KUI  89

 
 
18H 59M 23.80S -12 50' 25.7" P.A. 165.3 SEP 0.27 MAG 5.98,6.64 SP B5IV DIST. 146.2 PC (476.9 L.Y.)
 
 
Coord 2000
18594-1250
Discov num
KUI  89
Comp
Coord arcsec 2000
18 59 23.80 -12 50 25.7
Date first
1934
Date last
2015
Obs
67
Pa first
164
Pa last
160
P.A. Now (θ)
165.3°
Sep first
0.2
Sep last
0.3
Sep. Now (ρ)
0.27"
Mag pri
5.98
Mag sec
6.64
delta mag (ΔM)
0.66
Spectral class
B5IV (blue-white)
Pri motion ra
+008
Sec motion ra
Pri motion dec
-018
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Sagittarius
SAO
162052
HIP
93225
HD
176162
HR
7166
Distance
146.2
Distance ly
476.9
last precise pa
160.1
last precise sep
0.262
 
 
ORBITAL ELEMENTS
 
 
Period (P)82.76y Periastron (T)1993.25y Semi-major axis (a)0.224a
Eccentricity (e)0.506 Inclination (i)29.5° Longitude of periastron (ω)338.3°
Node (Ω)33° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.140 88.9
2001 0.147 96.9
2002 0.154 104.2
2003 0.161 110.8
2004 0.169 116.8
2005 0.177 122.2
2006 0.185 127.2
2007 0.193 131.8
2008 0.202 136.0
2009 0.210 139.9
2010 0.218 143.5
2011 0.225 146.8
2012 0.233 149.9
2013 0.240 152.8
2014 0.247 155.6
2015 0.254 158.2
2016 0.261 160.7
2017 0.268 163.0
2018 0.274 165.3
2019 0.280 167.4
2020 0.285 169.4
2021 0.290 171.4
2022 0.295 173.3
2023 0.300 175.2
2024 0.305 177.0
2025 0.309 178.7
2026 0.312 180.4
2027 0.316 182.1
2028 0.319 183.7
2029 0.322 185.3
2030 0.324 186.9

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