17179+4918 STF 2153 (HD 156963)

 
 
17h 17m 53.03s +49° 18' 18.5" P.A. 244.00 sep 1.6 mag 9.36,9.70 Sp K0
 
 
Coord 2000 17179+4918 Discov num STF2153 Comp Coord arcsec 2000 17 17 53.03 +49 18 18.5
Date first 1831 Date last 2020 Obs 91
Pa first 282 Pa last 243.9 P.A. Now (θ) 243.9°
Sep first 1.9 Sep last 1.568 Sep. Now (ρ) 1.568"
Mag pri 9.36 Mag sec 9.70 delta mag (ΔM) 0.34 Spectral class K0 (yellow-orange)
Pri motion ra -169 Sec motion ra -169
Pri motion dec -029 Sec motion dec -029
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 156963 Constellation Hercules SAO 46619 Tycho2 3516-00944-1
Gaia DR2 1366264113727211392 HD 156963 GC 23389 ADS 10460
 
 
ORBITAL ELEMENTS
 
 
Period (P)1205.1832y± 601.7165 Periastron (T)1757.5997y± 103.4437 Semi-major axis (a)3.32399a± 1.56807
Eccentricity (e)0.66855± 0.23856 Inclination (i)102.961°± 11.257 Longitude of periastron (ω)107.217°± 26.15
Node (Ω)102.94°± 13.021 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 248.7 1.528
2001 248.5 1.524
2002 248.2 1.519
2003 248.0 1.515
2004 247.8 1.510
2005 247.5 1.506
2006 247.3 1.501
2007 247.0 1.497
2008 246.8 1.493
2009 246.5 1.488
2010 246.3 1.484
2011 246.0 1.479
2012 245.8 1.475
2013 245.5 1.470
2014 245.3 1.466
2015 245.0 1.461
2016 244.8 1.457
2017 244.5 1.453
2018 244.2 1.448
2019 244.0 1.444
2020 243.7 1.440
2021 243.4 1.435
2022 243.2 1.431
2023 242.9 1.427
2024 242.6 1.422
2025 242.4 1.418
2026 242.1 1.414
2027 241.8 1.409
2028 241.5 1.405
2029 241.2 1.401
2030 241.0 1.397


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds17179%2B4918a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic