17156-1018 BU 957 (HD 156023)

 
 
17h 15m 34.66s -10° 17' 50.9" P.A. 56.00 sep 0.1 mag 7.51,9.69 Sp F5V dist. 108.11 pc (352.65 l.y.)
 
 
Coord 2000 17156-1018 Discov num BU  957 Comp Coord arcsec 2000 17 15 34.66 -10 17 50.9
Date first 1880 Date last 2021 Obs 52
Pa first 24 Pa last 56 P.A. Now (θ) 44.3°
Sep first 0.6 Sep last 0.077 Sep. Now (ρ) 0.099"
Mag pri 7.51 Mag sec 9.69 delta mag (ΔM) 2.18 Spectral class F5V (yellow-white)
Pri motion ra -009 Sec motion ra -009
Pri motion dec +022 Sec motion dec +022
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 156023 Constellation Ophiuchus SAO 160405 HIP 84423
Tycho2 5649-00247-1 Gaia DR2 4143224834422302336 HD 156023 ADS 10421
BD BD-10 4462 Distance 108.11 Distance ly 352.65
 
 
ORBITAL ELEMENTS
 
 
Period (P)91.1y± 2.9 Periastron (T)2030.2y± 1.8 Semi-major axis (a)0.287a± 0.013
Eccentricity (e)0.57± 0.048 Inclination (i)101.1°± 1.1 Longitude of periastron (ω)28.8°± 4.2
Node (Ω)25°± 1.2 Notesn ReferenceTok2020e
Equinox Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 192.0 0.271
2001 191.2 0.259
2002 190.4 0.247
2003 189.6 0.235
2004 188.6 0.222
2005 187.5 0.209
2006 186.2 0.196
2007 184.7 0.182
2008 183.1 0.168
2009 181.1 0.154
2010 178.7 0.139
2011 175.7 0.125
2012 171.9 0.110
2013 167.1 0.096
2014 160.5 0.082
2015 151.6 0.070
2016 139.1 0.060
2017 122.5 0.053
2018 103.1 0.051
2019 84.4 0.055
2020 69.4 0.063
2021 58.4 0.074
2022 50.4 0.086
2023 44.3 0.099
2024 39.6 0.110
2025 35.8 0.121
2026 32.5 0.128
2027 29.5 0.132
2028 26.5 0.132
2029 23.4 0.125
2030 19.8 0.112


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



 
 


wds17156-1018c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic