17563+0259 A  2189

 
 
17H 56M 16.70S +02 59' 09.1" P.A. 294.7 SEP 0.13 MAG 8.50,8.80 SP A2 DIST. 398.41 PC (1299.61 L.Y.)
 
 
Coord 2000
17563+0259
Discov num
A  2189
Comp
Coord arcsec 2000
17 56 16.70 +02 59 09.1
Date first
1910
Date last
2012
Obs
26
Pa first
326
Pa last
275
P.A. Now (θ)
294.7°
Sep first
0.3
Sep last
0.1
Sep. Now (ρ)
0.13"
Mag pri
8.50
Mag sec
8.80
delta mag (ΔM)
0.3
Spectral class
A2 (white)
Pri motion ra
+006
Sec motion ra
Pri motion dec
-012
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ophiuchus
HIP
87811
Tycho2
0421-00446-1
HD
163471
ADS
10899
BD
BD+03 3534
Distance
398.41
Distance ly
1299.61
last precise pa
275.2
last precise sep
0.105
 
 
ORBITAL ELEMENTS
 
 
Period (P)154.5y± 4 Periastron (T)1976.35y± 0.35 Semi-major axis (a)0.218a± 0.002
Eccentricity (e)0.496± 0.014 Inclination (i)71.7°± 1 Longitude of periastron (ω)327.6°± 2
Node (Ω)153.3°± 1 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2005
label rho theta
2000 0.071 217.5
2001 0.070 223.6
2002 0.069 229.9
2003 0.069 236.3
2004 0.070 242.5
2005 0.072 248.5
2006 0.074 254.2
2007 0.077 259.5
2008 0.080 264.4
2009 0.084 268.9
2010 0.088 273.0
2011 0.092 276.7
2012 0.097 280.1
2013 0.102 283.1
2014 0.107 285.9
2015 0.112 288.4
2016 0.118 290.7
2017 0.123 292.8
2018 0.128 294.7
2019 0.134 296.4
2020 0.139 298.1
2021 0.145 299.6
2022 0.150 301.0
2023 0.155 302.3
2024 0.161 303.5
2025 0.166 304.6
2026 0.171 305.6
2027 0.177 306.6
2028 0.182 307.6
2029 0.187 308.5
2030 0.192 309.3

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