15339-1700 HDS2185

 
 
15H 33M 56.80S -17 00' 08.2" P.A. 185.2 SEP 0.38 MAG 8.55,9.78 SP K0V DIST. 38.68 PC (126.17 L.Y.)
 
 
Coord 2000
15339-1700
Discov num
HDS2185
Comp
Coord arcsec 2000
15 33 56.80 -17 00 08.2
Date first
1991
Date last
2017
Obs
12
Pa first
326
Pa last
175
P.A. Now (θ)
185.2°
Sep first
0.7
Sep last
0.4
Sep. Now (ρ)
0.38"
Mag pri
8.55
Mag sec
9.78
delta mag (ΔM)
1.23
Spectral class
K0V (yellow-orange)
Pri motion ra
-088
Sec motion ra
-088
Pri motion dec
-324
Sec motion dec
-324
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Libra
SAO
159349
HIP
76203
Tycho2
6188-00764-1
HD
138648
BD
BD-16 4112
Distance
38.68
Distance ly
126.17
last precise pa
174.6
last precise sep
0.424
 
 
ORBITAL ELEMENTS
 
 
Period (P)60y Periastron (T)2011.53y± 0.02 Semi-major axis (a)0.5391a± 0.0018
Eccentricity (e)0.3681± 0.003 Inclination (i)40° Longitude of periastron (ω)152.3°± 1
Node (Ω)324°± 1 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2012
label rho theta
2000 0.491 357.1
2001 0.460 2.7
2002 0.428 9.0
2003 0.396 16.3
2004 0.365 24.9
2005 0.337 35.0
2006 0.315 46.8
2007 0.299 60.0
2008 0.292 74.3
2009 0.294 88.9
2010 0.304 102.8
2011 0.317 115.7
2012 0.332 127.5
2013 0.345 138.3
2014 0.356 148.4
2015 0.363 158.0
2016 0.369 167.3
2017 0.372 176.3
2018 0.376 185.2
2019 0.380 193.9
2020 0.385 202.4
2021 0.393 210.6
2022 0.403 218.5
2023 0.414 225.9
2024 0.428 232.9
2025 0.444 239.5
2026 0.461 245.5
2027 0.479 251.2
2028 0.498 256.4
2029 0.518 261.2
2030 0.537 265.6

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