18253+4846 STT 351 AC (HD 170109)

 
 
18h 25m 18.20s +48° 45' 42.5" P.A. 26.00 sep 1.0 mag 7.90,8.25 Sp G5 dist. 144.72 pc (472.08 l.y.)
 
 
Coord 2000 18253+4846 Discov num STT 351 Comp AC Coord arcsec 2000 18 25 18.20 +48 45 42.5
Date first 1843 Date last 2021 Obs 102
Pa first 45 Pa last 25.7 P.A. Now (θ) 25.7°
Sep first 0.3 Sep last 0.958 Sep. Now (ρ) 0.958"
Mag pri 7.90 Mag sec 8.25 delta mag (ΔM) 0.35 Spectral class G5 (yellow)
Pri motion ra +019 Sec motion ra +019
Pri motion dec +004 Sec motion dec +004
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
18253+4846 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 47482 18 25 18 +48 45 42 HU 66 AB 2016 65 197 0.2 7.90 8.40 0.50 Y
Show HD 170109 47482 18 25 18 +48 45 42 STT 351 AC 2021 102 26 1.0 7.90 8.25 0.35 Y <===
Show 18 25 18 +48 45 42 HU 66 BC 2019 20 26 0.8 8.40 8.25 0.15 Y
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 170109 Constellation Draco SAO 47482 HIP 90284
Tycho2 3534-00302-1 Gaia DR2 2123486226905640960 HD 170109 BD BD+48 2692
Distance 144.72 Distance ly 472.08
 
 
ORBITAL ELEMENTS
 
 
Period (P)3025.4903y± 1692.4837 Periastron (T)2320.8534y± 536.1239 Semi-major axis (a)3.80032a± 2.01917
Eccentricity (e)0.80754± 0.13757 Inclination (i)82.801°± 6.417 Longitude of periastron (ω)60.383°± 47.747
Node (Ω)57.244°± 32.434 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 22.1 0.748
2001 22.3 0.750
2002 22.5 0.753
2003 22.8 0.756
2004 23.0 0.758
2005 23.2 0.761
2006 23.4 0.763
2007 23.6 0.766
2008 23.9 0.768
2009 24.1 0.771
2010 24.3 0.774
2011 24.5 0.776
2012 24.7 0.779
2013 24.9 0.781
2014 25.1 0.784
2015 25.3 0.787
2016 25.5 0.789
2017 25.7 0.792
2018 25.9 0.795
2019 26.1 0.797
2020 26.3 0.800
2021 26.5 0.803
2022 26.7 0.805
2023 26.9 0.808
2024 27.1 0.811
2025 27.3 0.813
2026 27.5 0.816
2027 27.7 0.819
2028 27.9 0.821
2029 28.1 0.824
2030 28.3 0.827


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



 
 


wds18253%2B4846c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic