17176+1025 HDS2445 (V2369 Oph)

 
 
17H 17M 34.67S +10 24' 59.3" P.A. 258.2 SEP 0.3 MAG 8.86,10.25 SP G5 DIST. 69.49 PC (226.68 L.Y.)
 
 
Coord 2000
17176+1025
Discov num
HDS2445
Comp
Coord arcsec 2000
17 17 34.67 +10 24 59.3
Date first
1991
Date last
2017
Obs
8
Pa first
86
Pa last
258
P.A. Now (θ)
258.2°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.3"
Mag pri
8.86
Mag sec
10.25
delta mag (ΔM)
1.39
Spectral class
G5 (yellow)
Pri motion ra
+025
Sec motion ra
Pri motion dec
-041
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name
V2369 Oph
Constellation
Ophiuchus
SAO
102718
HIP
84595
Tycho2
0982-02178-1
HD
156498
BD
BD+10 3177
Distance
69.49
Distance ly
226.68
last precise pa
258.2
last precise sep
0.199
 
 
ORBITAL ELEMENTS
 
 
Period (P)77.12y Periastron (T)2004.47y Semi-major axis (a)0.332a
Eccentricity (e)0.402 Inclination (i)100.9° Longitude of periastron (ω)93.6°
Node (Ω)82.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.162 72.6
2001 0.129 68.3
2002 0.094 61.0
2003 0.061 45.3
2004 0.038 3.4
2005 0.050 310.1
2006 0.082 288.3
2007 0.117 279.1
2008 0.150 274.0
2009 0.180 270.8
2010 0.207 268.4
2011 0.230 266.5
2012 0.249 265.0
2013 0.264 263.6
2014 0.276 262.4
2015 0.285 261.3
2016 0.292 260.2
2017 0.295 259.2
2018 0.297 258.2
2019 0.296 257.1
2020 0.294 256.1
2021 0.290 255.1
2022 0.284 254.0
2023 0.277 252.9
2024 0.269 251.7
2025 0.260 250.4
2026 0.250 249.0
2027 0.239 247.5
2028 0.228 245.9
2029 0.216 244.1
2030 0.203 242.1

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