17102+5430 STF 2138 AB (HD 155674)

 
 
17h 10m 10.51s +54° 29' 39.8" P.A. 133.00 sep 22.1 mag 8.99,9.36 Sp K6V+K6V dist. 19.86 pc (64.78 l.y.)
 
 
Coord 2000 17102+5430 Discov num STF2138 Comp AB Coord arcsec 2000 17 10 10.51 +54 29 39.8
Date first 1830 Date last 2019 Obs 67
Pa first 139 Pa last 132.8 P.A. Now (θ) 132.8°
Sep first 22.3 Sep last 22.148 Sep. Now (ρ) 22.148"
Mag pri 8.99 Mag sec 9.36 delta mag (ΔM) 0.37 Spectral class K6V+K6V (yellow-orange/yellow-orange)
Pri motion ra +082 Sec motion ra +086
Pri motion dec -111 Sec motion dec -103
Notes N O T (See Notes, Orbital solution, Parallax indicates physical)
rPM=0.065 (< 0.3, Physical double)
This double is physical.
 
 
17102+5430 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 155674 30274 17 10 11 +54 29 40 STF 2138 AB 2019 67 133 22.1 8.99 9.36 0.37 Y <===
Show 30274 17 10 11 +54 29 40 SHY 89 AC 1999 3 10 999.9 8.99 8.67 0.32
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 155674 Constellation Draco SAO 30274 HIP 83988
Tycho2 3891-01304-1 Gaia DR2 1420000579871414528 HD 155674 ADS 10386
GL Gl 659A BD BD+54 1861 Distance 19.86 Distance ly 64.78
 
 
ORBITAL ELEMENTS
 
 
Period (P)4478y± 660 Periastron (T)4179y± 333 Semi-major axis (a)15.247a± 1.505
Eccentricity (e)0.47± 0.13 Inclination (i)131°± 7 Longitude of periastron (ω)10°± 16
Node (Ω)321°± 6 Notesn ReferencePko2021a
Equinox Last observation Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 133.1 22.125
2001 133.1 22.123
2002 133.0 22.121
2003 133.0 22.119
2004 133.0 22.118
2005 133.0 22.116
2006 132.9 22.114
2007 132.9 22.112
2008 132.9 22.110
2009 132.9 22.108
2010 132.9 22.106
2011 132.8 22.104
2012 132.8 22.102
2013 132.8 22.100
2014 132.8 22.098
2015 132.7 22.096
2016 132.7 22.094
2017 132.7 22.092
2018 132.7 22.089
2019 132.7 22.087
2020 132.6 22.085
2021 132.6 22.083
2022 132.6 22.081
2023 132.6 22.079
2024 132.5 22.077
2025 132.5 22.075
2026 132.5 22.072
2027 132.5 22.070
2028 132.5 22.068
2029 132.4 22.066
2030 132.4 22.064


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



 
 


wds17102%2B5430g.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic