18092-2211 RST3157

 
 
18H 09M 12.18S -22 11' 00.6" P.A. 61.9 SEP 0.19 MAG 9.58,9.92 SP K3/4V DIST. 32.8 PC (106.99 L.Y.)
 
 
Coord 2000
18092-2211
Discov num
RST3157
Comp
Coord arcsec 2000
18 09 12.18 -22 11 00.6
Date first
1935
Date last
2015
Obs
28
Pa first
109
Pa last
310
P.A. Now (θ)
61.9°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.19"
Mag pri
9.58
Mag sec
9.92
delta mag (ΔM)
0.34
Spectral class
K3/4V (yellow-orange)
Pri motion ra
-015
Sec motion ra
Pri motion dec
-085
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Sagittarius
SAO
186363
HIP
88932
Tycho2
6276-00651-1
HD
165893
BD
BD-22 4584
CD
CD-2212617
CP
CP-22 6736
Distance
32.8
Distance ly
106.99
last precise pa
309.8
last precise sep
0.062
 
 
ORBITAL ELEMENTS
 
 
Period (P)10.685y± 0.045 Periastron (T)2015.031y± 0.02 Semi-major axis (a)0.1575a± 0.0019
Eccentricity (e)0.409± 0.008 Inclination (i)50.2°± 1.2 Longitude of periastron (ω)55.5°± 1.3
Node (Ω)232.4°± 1.3 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.148 114.4
2001 0.128 140.4
2002 0.119 173.2
2003 0.118 207.7
2004 0.091 249.6
2005 0.072 349.9
2006 0.139 38.5
2007 0.180 57.4
2008 0.192 71.2
2009 0.184 84.8
2010 0.165 100.7
2011 0.141 121.7
2012 0.123 150.2
2013 0.119 184.1
2014 0.115 219.0
2015 0.074 272.5
2016 0.093 13.1
2017 0.156 45.6
2018 0.186 61.9
2019 0.191 75.4
2020 0.179 89.4
2021 0.157 106.7
2022 0.134 129.8
2023 0.120 160.6
2024 0.119 195.0
2025 0.107 231.4
2026 0.062 307.1
2027 0.116 27.4
2028 0.169 51.4
2029 0.190 66.3
2030 0.189 79.6

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