17115-1630 HU  169

 
 
17H 11M 29.58S -16 29' 30.8" P.A. 179.7 SEP 0.26 MAG 8.61,8.12 SP A4V DIST. 120.63 PC (393.5 L.Y.)
 
 
Coord 2000
17115-1630
Discov num
HU  169
Comp
Coord arcsec 2000
17 11 29.58 -16 29 30.8
Date first
1900
Date last
2008
Obs
26
Pa first
223
Pa last
197
P.A. Now (θ)
179.7°
Sep first
0.1
Sep last
0.2
Sep. Now (ρ)
0.26"
Mag pri
8.61
Mag sec
8.12
delta mag (ΔM)
0.49
Spectral class
A4V (white)
Pri motion ra
-011
Sec motion ra
Pri motion dec
-003
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ophiuchus
SAO
160347
HIP
84092
Tycho2
6232-00807-1
HD
155317
ADS
10385
BD
BD-16 4436
Distance
120.63
Distance ly
393.5
last precise pa
196.7
last precise sep
0.23
 
 
ORBITAL ELEMENTS
 
 
Period (P)79.14y Periastron (T)1992.09y Semi-major axis (a)0.217a
Eccentricity (e)0.458 Inclination (i)125.5° Longitude of periastron (ω)63°
Node (Ω)22.1° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.149 222.1
2001 0.163 217.5
2002 0.176 213.7
2003 0.188 210.3
2004 0.198 207.3
2005 0.208 204.7
2006 0.216 202.2
2007 0.224 199.9
2008 0.230 197.8
2009 0.236 195.7
2010 0.241 193.8
2011 0.245 191.9
2012 0.248 190.1
2013 0.250 188.3
2014 0.252 186.5
2015 0.254 184.8
2016 0.254 183.1
2017 0.255 181.4
2018 0.255 179.7
2019 0.254 178.0
2020 0.253 176.3
2021 0.251 174.5
2022 0.249 172.8
2023 0.247 171.0
2024 0.245 169.1
2025 0.242 167.3
2026 0.239 165.4
2027 0.235 163.4
2028 0.232 161.4
2029 0.228 159.3
2030 0.224 157.1

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