09442-2746 FIN 326 (The Ant)

 
 
09h 44m 12.13s -27° 46' 10.4" P.A. 346.00 sep 0.1 mag 5.30,6.18 Sp F7V dist. 104.06 pc (339.44 l.y.)
 
 
Coord 2000 09442-2746 Discov num FIN 326 Comp Coord arcsec 2000 09 44 12.13 -27 46 10.4
Date first 1952 Date last 2021 Obs 56
Pa first 251 Pa last 345.7 P.A. Now (θ) 312.3°
Sep first 0.1 Sep last 0.062 Sep. Now (ρ) 0.064"
Mag pri 5.30 Mag sec 6.18 delta mag (ΔM) 0.88 Spectral class F7V (yellow-white)
Pri motion ra -047 Sec motion ra
Pri motion dec +035 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name The Ant Constellation Antlia SAO 177908 HIP 47758
Tycho2 6610-02315-1 Gaia DR2 5657043095060156416 HD 84367 HR 3871
GC 13425 GL Gl 366.1A CD CD-27 6881 CP CP-27 3851
Bayer Theta Antliae Bayer name The Ant FK5 366 Distance 104.06
Distance ly 339.44 Bayer greek θ Ant
 
 
ORBITAL ELEMENTS
 
 
Period (P)18.39y± 0.08 Periastron (T)2020.92y± 0.08 Semi-major axis (a)0.1075a± 0.0012
Eccentricity (e)0.506± 0.015 Inclination (i)126.8°± 0.9 Longitude of periastron (ω)138.2°± 2.6
Node (Ω)175°± 1.8 Notesn ReferenceTok2020e
Equinox Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 156.7 0.089
2001 133.5 0.056
2002 63.8 0.035
2003 1.3 0.055
2004 329.6 0.064
2005 301.3 0.065
2006 274.6 0.069
2007 252.8 0.079
2008 236.6 0.092
2009 224.6 0.106
2010 215.4 0.119
2011 207.9 0.130
2012 201.5 0.139
2013 195.7 0.144
2014 190.2 0.146
2015 184.6 0.143
2016 178.6 0.135
2017 171.5 0.121
2018 161.9 0.099
2019 145.2 0.069
2020 99.1 0.038
2021 18.7 0.047
2022 341.0 0.062
2023 312.3 0.064
2024 284.6 0.066
2025 260.6 0.074
2026 242.3 0.087
2027 228.9 0.101
2028 218.8 0.114
2029 210.7 0.126
2030 203.9 0.136


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



 
 


wds09442-2746e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic