18480-1009 HDS2665

 
 
18H 48M 01.45S -10 08' 44.7" P.A. 143.1 SEP 0.21 MAG 8.64,11.83 SP K0 DIST. 27.79 PC (90.65 L.Y.)
 
 
Coord 2000
18480-1009
Discov num
HDS2665
Comp
Coord arcsec 2000
18 48 01.45 -10 08 44.7
Date first
1991
Date last
2015
Obs
6
Pa first
359
Pa last
97
P.A. Now (θ)
143.1°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.21"
Mag pri
8.64
Mag sec
11.83
delta mag (ΔM)
3.19
Spectral class
K0 (yellow-orange)
Pri motion ra
+058
Sec motion ra
Pri motion dec
-229
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Scutum
HIP
92250
HD
173872
Distance
27.79
Distance ly
90.65
last precise pa
97.2
last precise sep
0.312
 
 
ORBITAL ELEMENTS
 
 
Period (P)31.212y± 0.003 Periastron (T)2020.007y± 0.194 Semi-major axis (a)0.4535a± 0.0178
Eccentricity (e)0.705± 0.014 Inclination (i)49.1°± 3.4 Longitude of periastron (ω)44.2°± 3.4
Node (Ω)192.8°± 1.3 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.671 34.5
2001 0.676 37.0
2002 0.676 39.4
2003 0.671 41.8
2004 0.662 44.3
2005 0.649 46.8
2006 0.632 49.5
2007 0.611 52.4
2008 0.586 55.4
2009 0.558 58.8
2010 0.526 62.6
2011 0.492 66.8
2012 0.454 71.7
2013 0.413 77.6
2014 0.371 84.8
2015 0.328 93.8
2016 0.284 105.7
2017 0.244 121.6
2018 0.210 143.1
2019 0.177 172.7
2020 0.114 224.7
2021 0.140 320.7
2022 0.256 351.4
2023 0.355 3.3
2024 0.433 10.4
2025 0.495 15.6
2026 0.545 19.6
2027 0.585 23.1
2028 0.616 26.1
2029 0.640 28.9
2030 0.658 31.5

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