03177+3838 STT 53 AB (HD 20347)

 
 
03h 17m 44.01s +38° 38' 21.1" P.A. 232.00 sep 0.6 mag 7.73,8.50 Sp G0 dist. 60.1 pc (196.05 l.y.)
 
 
Coord 2000 03177+3838 Discov num STT  53 Comp AB Coord arcsec 2000 03 17 44.01 +38 38 21.1
Date first 1843 Date last 2018 Obs 151
Pa first 270 Pa last 231.9 P.A. Now (θ) 225°
Sep first 0.7 Sep last 0.55 Sep. Now (ρ) 0.518"
Mag pri 7.73 Mag sec 8.50 delta mag (ΔM) 0.77 Spectral class G0 (yellow)
Pri motion ra +112 Sec motion ra +112
Pri motion dec -044 Sec motion dec -044
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
03177+3838 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 20347 56320 03 17 44 +38 38 21 STT 53 AB 2018 151 232 0.6 7.73 8.50 0.77 Y <===
Show 56320 03 17 44 +38 38 21 TOK 237 AC 2002 6 180 106.6 7.73 13.34 5.61
Show 03 17 44 +38 36 34 RAO 10 Ca,Cb 2016 3 222 1.6 13.00 17.00 4.00
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 20347 Constellation Perseus SAO 56320 HIP 15329
Tycho2 2848-01379-1 Gaia DR2 235543604311944320 HD 20347 GC 3926
ADS 2446 BD BD+38 689 Distance 60.1 Distance ly 196.05
 
 
ORBITAL ELEMENTS
 
 
Period (P)114.3y± 0.96 Periastron (T)1931.8y± 1 Semi-major axis (a)0.71a± 0.024
Eccentricity (e)0.86± 0.01 Inclination (i)121.7°± 1.7 Longitude of periastron (ω)70.9°± 2.1
Node (Ω)135.1°± 3 Notesn ReferenceRbr2018
Equinox2000 Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 250.3 0.726
2001 249.5 0.719
2002 248.6 0.712
2003 247.8 0.705
2004 246.9 0.698
2005 246.0 0.690
2006 245.1 0.682
2007 244.2 0.674
2008 243.3 0.666
2009 242.3 0.657
2010 241.3 0.649
2011 240.3 0.640
2012 239.2 0.631
2013 238.1 0.621
2014 237.0 0.612
2015 235.8 0.602
2016 234.7 0.592
2017 233.4 0.582
2018 232.1 0.572
2019 230.8 0.561
2020 229.4 0.551
2021 228.0 0.540
2022 226.5 0.529
2023 225.0 0.518
2024 223.3 0.506
2025 221.6 0.494
2026 219.8 0.483
2027 218.0 0.471
2028 216.0 0.459
2029 213.9 0.446
2030 211.7 0.434


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



 
 


wds03177%2B3838f.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic