18108-3529 B  1352

 
 
18H 10M 46.22S -35 28' 40.9" P.A. 199.5 SEP 0.31 MAG 9.88,9.87 SP G3V DIST. 101.21 PC (330.15 L.Y.)
 
 
Coord 2000
18108-3529
Discov num
B  1352
Comp
Coord arcsec 2000
18 10 46.22 -35 28 40.9
Date first
1932
Date last
2015
Obs
11
Pa first
62
Pa last
213
P.A. Now (θ)
199.5°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.31"
Mag pri
9.88
Mag sec
9.87
delta mag (ΔM)
0.01
Spectral class
G3V (yellow)
Pri motion ra
+015
Sec motion ra
Pri motion dec
-015
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Sagittarius
SAO
209813
HIP
89076
Tycho2
7400-01004-1
HD
166136
CD
CD-3512338
CP
CP-35 7781
Distance
101.21
Distance ly
330.15
last precise pa
213.3
last precise sep
0.237
 
 
ORBITAL ELEMENTS
 
 
Period (P)123.84y Periastron (T)2039.29y Semi-major axis (a)0.257a
Eccentricity (e)0.45 Inclination (i)51.4° Longitude of periastron (ω)81.9°
Node (Ω)240° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.231 182.7
2001 0.232 184.7
2002 0.232 186.7
2003 0.233 188.7
2004 0.233 190.7
2005 0.234 192.6
2006 0.234 194.6
2007 0.234 196.5
2008 0.235 198.5
2009 0.235 200.4
2010 0.235 202.4
2011 0.235 204.3
2012 0.234 206.3
2013 0.234 208.2
2014 0.233 210.2
2015 0.233 212.1
2016 0.232 214.1
2017 0.230 216.1
2018 0.229 218.2
2019 0.227 220.2
2020 0.224 222.3
2021 0.222 224.5
2022 0.219 226.7
2023 0.215 229.0
2024 0.211 231.3
2025 0.206 233.8
2026 0.201 236.4
2027 0.195 239.1
2028 0.188 242.0
2029 0.181 245.2
2030 0.173 248.6

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