02374-5233 TOK 186 Aa,Ab

 
 
02h 37m 24.26s -52° 32' 35.1" P.A. 69.00 sep 0.1 mag 5.50,6.50 Sp A6V dist. 45.56 pc (148.62 l.y.)
 
 
Coord 2000 02374-5233 Discov num TOK 186 Comp Aa,Ab Coord arcsec 2000 02 37 24.26 -52 32 35.1
Date first 2011 Date last 2021 Obs 26
Pa first 60 Pa last 69 P.A. Now (θ) 351.5°
Sep first 0.1 Sep last 0.069 Sep. Now (ρ) 0.041"
Mag pri 5.50 Mag sec 6.50 delta mag (ΔM) 1 Spectral class A6V (white)
Pri motion ra +111 Sec motion ra
Pri motion dec +001 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
02374-5233 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 232835 02 37 24 -52 32 35 TOK 186 Aa,Ab 2021 26 69 0.1 5.50 6.50 1.00 Y <===
Show Eta Hor 232835 02 37 24 -52 32 35 EHR 2 AB 2008 3 232 4.9 4.50 14.00 9.50
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Horologium SAO 232835 HIP 12225 Tycho2 8484-01504-1
Gaia DR2 4745123853382686336 HD 16555 HR 778 GC 3166
CP CP-53 457 Bayer Eta Horologii Bayer name Eta Hor FK5 2182
Distance 45.56 Distance ly 148.62 Bayer greek η Hor
 
 
ORBITAL ELEMENTS
 
 
Period (P)3.171y Periastron (T)2011.523y Semi-major axis (a)0.079a
Eccentricity (e)0.065 Inclination (i)116.5° Longitude of periastron (ω)38°
Node (Ω)232.6° Notesn ReferenceTok2017c
Equinox2000 Last observation2017 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 54.8 0.082
2001 307.6 0.037
2002 214.2 0.062
2003 63.3 0.076
2004 346.4 0.040
2005 226.0 0.072
2006 74.2 0.064
2007 13.3 0.052
2008 235.8 0.075
2009 91.6 0.048
2010 29.1 0.066
2011 246.0 0.070
2012 124.1 0.035
2013 39.7 0.077
2014 259.1 0.058
2015 169.4 0.037
2016 48.1 0.082
2017 279.7 0.045
2018 199.6 0.050
2019 56.0 0.082
2020 313.6 0.037
2021 216.2 0.064
2022 64.7 0.075
2023 351.5 0.041
2024 227.5 0.073
2025 76.3 0.062
2026 16.2 0.054
2027 237.2 0.074
2028 95.3 0.046
2029 31.0 0.068
2030 247.7 0.068


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



 
 


wds02374-5233e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic