17184+3240 BU  628

 
 
17H 18M 22.22S +32 39' 38.5" P.A. 262.2 SEP 0.57 MAG 9.48,9.56 SP G0 DIST. 140.85 PC (459.45 L.Y.)
 
 
Coord 2000
17184+3240
Discov num
BU  628
Comp
Coord arcsec 2000
17 18 22.22 +32 39 38.5
Date first
1878
Date last
2010
Obs
72
Pa first
6
Pa last
265
P.A. Now (θ)
262.2°
Sep first
0.5
Sep last
0.5
Sep. Now (ρ)
0.57"
Mag pri
9.48
Mag sec
9.56
delta mag (ΔM)
0.08
Spectral class
G0 (yellow)
Pri motion ra
-025
Sec motion ra
-025
Pri motion dec
-043
Sec motion dec
-043
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
65929
HIP
84653
Tycho2
2596-00631-1
ADS
10459
BD
BD+32 2888
Distance
140.85
Distance ly
459.45
last precise pa
265.3
last precise sep
0.54
 
 
ORBITAL ELEMENTS
 
 
Period (P)699y± 11 Periastron (T)1807.2y± 3.3 Semi-major axis (a)0.885a± 0.05
Eccentricity (e)0.371± 0.01 Inclination (i)116.8°± 1.6 Longitude of periastron (ω)325.8°± 1.6
Node (Ω)27.3°± 2.6 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.504 272.9
2001 0.507 272.3
2002 0.510 271.6
2003 0.514 271.0
2004 0.517 270.3
2005 0.520 269.7
2006 0.523 269.1
2007 0.527 268.5
2008 0.530 267.9
2009 0.534 267.3
2010 0.537 266.7
2011 0.541 266.1
2012 0.544 265.5
2013 0.548 264.9
2014 0.551 264.4
2015 0.555 263.8
2016 0.558 263.3
2017 0.562 262.8
2018 0.566 262.2
2019 0.569 261.7
2020 0.573 261.2
2021 0.577 260.7
2022 0.581 260.2
2023 0.584 259.7
2024 0.588 259.2
2025 0.592 258.7
2026 0.596 258.2
2027 0.600 257.7
2028 0.604 257.3
2029 0.607 256.8
2030 0.611 256.4

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