18483-6856 JAO   8

 
 
18H 48M 21.10S -68 55' 32.0" P.A. 278 SEP 0.3 MAG 23.60,20.90 SP M5.0V+WD
 
 
Coord 2000
18483-6856
Discov num
JAO   8
Comp
Coord arcsec 2000
18 48 21.10 -68 55 32.0
Date first
2011
Date last
2011
Obs
1
Pa first
278
Pa last
278
P.A. Now (θ)
278°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.3"
Mag pri
23.60
Mag sec
20.90
delta mag (ΔM)
2.7
Spectral class
M5.0V+WD (red/Wolf-Rayet)
Pri motion ra
-034
Sec motion ra
Pri motion dec
-123
Sec motion dec
Notes
N O P (See Notes, Orbital solution, 100-year proper motion)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Pavo
last precise pa
277.6
last precise sep
0.349
 
 
ORBITAL ELEMENTS
 
 
Period (P)15.17y± 3.25 Periastron (T)2004.58y± 0.02 Semi-major axis (a)0.2082a± 0.0255
Eccentricity (e)0.84± 0.03 Inclination (i)90.32°± 0.37 Longitude of periastron (ω)280.74°± 4.85
Node (Ω)248.08°± 2.25 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation2011
label rho theta
2000 0.134 68.8
2001 0.146 68.7
2002 0.150 68.5
2003 0.140 68.4
2004 0.095 68.2
2005 0.071 247.9
2006 0.083 247.5
2007 0.066 246.9
2008 0.041 245.8
2009 0.014 240.4
2010 0.014 76.4
2011 0.041 71.0
2012 0.067 69.9
2013 0.092 69.4
2014 0.113 69.1
2015 0.131 68.9
2016 0.144 68.7
2017 0.150 68.6
2018 0.143 68.4
2019 0.108 68.2
2020 0.056 248.1
2021 0.084 247.5
2022 0.069 247.0
2023 0.045 246.0
2024 0.019 242.4
2025 0.009 80.5
2026 0.037 71.3
2027 0.063 70.0
2028 0.088 69.4
2029 0.110 69.1
2030 0.128 68.9

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