02471+3533 BU 9 AB (HD 17240)

 
 
02h 47m 03.60s +35° 33' 17.3" P.A. 217.00 sep 0.9 mag 6.42,8.64 Sp F0IV dist. 50.61 pc (165.09 l.y.)
 
 
Coord 2000 02471+3533 Discov num BU    9 Comp AB Coord arcsec 2000 02 47 03.60 +35 33 17.3
Date first 1872 Date last 2016 Obs 66
Pa first 165 Pa last 217.3 P.A. Now (θ) 217.3°
Sep first 1.5 Sep last 0.925 Sep. Now (ρ) 0.925"
Mag pri 6.42 Mag sec 8.64 delta mag (ΔM) 2.22 Spectral class F0IV (yellow-white)
Pri motion ra -040 Sec motion ra -040
Pri motion dec -054 Sec motion dec -054
Notes O (Orbital solution)
This double is physical.
 
 
02471+3533 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 17240 55872 02 47 04 +35 33 17 BU 9 AB 2016 66 217 0.9 6.42 8.64 2.22 Y <===
Show 55872 02 47 04 +35 33 17 BU 9 AC 2015 6 128 30.6 6.42 13.30 6.88
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 17240 Constellation Perseus SAO 55872 HIP 12990
Tycho2 2333-00738-1 Gaia DR2 140919702344897024 HD 17240 HR 820
GC 3337 ADS 2117 BD BD+34 513 Distance 50.61
Distance ly 165.09
 
 
ORBITAL ELEMENTS
 
 
Period (P)616y Periastron (T)1952y Semi-major axis (a)1.882a
Eccentricity (e)0.1 Inclination (i)67.3° Longitude of periastron (ω)21.5°
Node (Ω)174° Notes ReferenceZir2015a
Equinox2000 Last observation2009 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 203.4 1.116
2001 204.0 1.104
2002 204.7 1.092
2003 205.4 1.080
2004 206.1 1.068
2005 206.8 1.056
2006 207.5 1.044
2007 208.2 1.032
2008 209.0 1.020
2009 209.8 1.008
2010 210.6 0.996
2011 211.4 0.984
2012 212.2 0.972
2013 213.0 0.960
2014 213.9 0.949
2015 214.8 0.937
2016 215.7 0.926
2017 216.7 0.915
2018 217.6 0.904
2019 218.6 0.893
2020 219.6 0.882
2021 220.7 0.871
2022 221.7 0.861
2023 222.8 0.850
2024 223.9 0.840
2025 225.1 0.830
2026 226.2 0.821
2027 227.4 0.811
2028 228.6 0.802
2029 229.9 0.793
2030 231.2 0.785


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



 
 


wds02471%2B3533a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic