17136+1716 A  2087

 
 
17H 13M 38.90S +17 16' 27.0" P.A. 135.8 SEP 0.48 MAG 10.47,10.73 SP G5 DIST. 121.8 PC (397.31 L.Y.)
 
 
Coord 2000
17136+1716
Discov num
A  2087
Comp
Coord arcsec 2000
17 13 38.90 +17 16 27.0
Date first
1909
Date last
2009
Obs
28
Pa first
193
Pa last
129
P.A. Now (θ)
135.8°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.48"
Mag pri
10.47
Mag sec
10.73
delta mag (ΔM)
0.26
Spectral class
G5 (yellow)
Pri motion ra
+017
Sec motion ra
Pri motion dec
+018
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
102661
HIP
84274
Tycho2
1540-02028-1
ADS
10403
BD
BD+17 3190
Distance
121.8
Distance ly
397.31
last precise pa
129.4
last precise sep
0.407
 
 
ORBITAL ELEMENTS
 
 
Period (P)300.41y Periastron (T)1969.64y Semi-major axis (a)0.464a
Eccentricity (e)0.666 Inclination (i)59.5° Longitude of periastron (ω)208.7°
Node (Ω)143.7° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.327 124.9
2001 0.337 125.8
2002 0.347 126.7
2003 0.357 127.4
2004 0.367 128.2
2005 0.376 128.9
2006 0.385 129.6
2007 0.394 130.2
2008 0.403 130.8
2009 0.412 131.4
2010 0.421 132.0
2011 0.429 132.5
2012 0.437 133.0
2013 0.445 133.5
2014 0.453 134.0
2015 0.461 134.5
2016 0.468 134.9
2017 0.476 135.4
2018 0.483 135.8
2019 0.490 136.2
2020 0.497 136.6
2021 0.504 137.0
2022 0.510 137.4
2023 0.517 137.8
2024 0.523 138.1
2025 0.530 138.5
2026 0.536 138.8
2027 0.542 139.2
2028 0.548 139.5
2029 0.553 139.8
2030 0.559 140.1

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