17155+1052 HDS 2440 (HD 156146)

17h 15m 28.89s +10° 51' 36.0" P.A. 82.00 sep 0.2 mag 9.24,10.04 Sp G5 dist. 71.48 pc (233.17 l.y.)

Coord 2000 17155+1052 Discov num HDS2440 Comp Coord arcsec 2000 17 15 28.89 +10 51 36.0
Date first 1991 Date last 2021 Obs 15
Pa first 293 Pa last 82.1 P.A. Now (θ) 71.4°
Sep first 0.1 Sep last 0.159 Sep. Now (ρ) 0.151"
Mag pri 9.24 Mag sec 10.04 delta mag (ΔM) 0.8 Spectral class G5 (yellow)
Pri motion ra -065 Sec motion ra
Pri motion dec -225 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 156146 Constellation Ophiuchus SAO 102690 HIP 84417
Tycho2 0982-02190-1 Gaia DR2 4539864892406879872 HD 156146 GC 23297
BD BD+11 3146 Distance 71.48 Distance ly 233.17




ORBITAL ELEMENTS

Period (P)25.73y± 0.26 Periastron (T)2002.46y± 0.12 Semi-major axis (a)153.7m± 1.3
Eccentricity (e)0.252± 0.012 Inclination (i)120.5°± 1 Longitude of periastron (ω)109.3°± 1.5
Node (Ω)75.25°± 0.6 Notes ReferenceMdz2021
Equinox Last observation Grade3(1=Definitive, 9=Indet.)

label theta rho
2000 40.8 0.091
2001 13.4 0.066
2002 329.4 0.060
2003 294.0 0.079
2004 274.4 0.104
2005 262.1 0.124
2006 252.5 0.135
2007 243.9 0.138
2008 235.2 0.134
2009 225.5 0.126
2010 214.3 0.115
2011 200.8 0.105
2012 184.9 0.098
2013 167.3 0.096
2014 150.1 0.100
2015 135.0 0.108
2016 122.5 0.120
2017 112.3 0.133
2018 103.9 0.145
2019 96.7 0.155
2020 90.3 0.162
2021 84.2 0.164
2022 78.0 0.160
2023 71.4 0.151
2024 63.4 0.134
2025 52.6 0.111
2026 35.1 0.084
2027 2.6 0.062
2028 317.9 0.064
2029 287.6 0.086
2030 270.6 0.111


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



 
 


wds17155%2B1052c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic