02057-2423 I 454 AB (HD 12889)

 
 
02h 05m 41.51s -24° 22' 33.8" P.A. 166.00 sep 0.5 mag 8.62,11.32 Sp G9+G9+K5V dist. 46.64 pc (152.14 l.y.)
 
 
Coord 2000 02057-2423 Discov num I   454 Comp AB Coord arcsec 2000 02 05 41.51 -24 22 33.8
Date first 1909 Date last 2021 Obs 45
Pa first 140 Pa last 166.4 P.A. Now (θ) 166.4°
Sep first 1.2 Sep last 0.51 Sep. Now (ρ) 0.51"
Mag pri 8.62 Mag sec 11.32 delta mag (ΔM) 2.7 Spectral class G9+G9+K5V (yellow/yellow)
Pri motion ra +419 Sec motion ra +420
Pri motion dec -064 Sec motion dec -057
Notes N O (See Notes, Orbital solution)
rPM=0.017 (< 0.3, Physical double)
This double is physical.
 
 
02057-2423 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 167545 02 05 42 -24 22 34 WSI 71 Aa,Ab 2021 23 214 0.0 9.27 9.50 0.23 Y
Show HD 12889 167545 02 05 42 -24 22 34 I 454 AB 2021 45 166 0.5 8.62 11.32 2.70 Y <===
Show 167545 02 05 42 -24 22 34 I 454 AB,C 2015 19 257 56.6 8.62 8.96 0.34
Quintuple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 12889 Constellation Fornax SAO 167545 HIP 9774
Tycho2 6430-00057-1 HD 12889 ADS 1652 CD CD-24 891
CP CP-24 237 Distance 46.64 Distance ly 152.14
 
 
ORBITAL ELEMENTS
 
 
Period (P)213y± 213 Periastron (T)2057y± 43 Semi-major axis (a)1.03a± 0.66
Eccentricity (e)0.45± 0.84 Inclination (i)76°± 11 Longitude of periastron (ω)175°± 85
Node (Ω)140°± 8 Notesn ReferenceTok2014b
Equinox2000 Last observation2014 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 149.6 1.043
2001 150.0 1.022
2002 150.3 1.002
2003 150.7 0.980
2004 151.1 0.959
2005 151.6 0.937
2006 152.0 0.914
2007 152.5 0.891
2008 153.0 0.868
2009 153.5 0.844
2010 154.1 0.819
2011 154.7 0.795
2012 155.3 0.769
2013 156.0 0.744
2014 156.7 0.718
2015 157.5 0.691
2016 158.3 0.664
2017 159.3 0.637
2018 160.3 0.610
2019 161.4 0.582
2020 162.6 0.554
2021 163.9 0.526
2022 165.4 0.497
2023 167.0 0.468
2024 168.9 0.440
2025 171.1 0.411
2026 173.5 0.383
2027 176.4 0.355
2028 179.7 0.327
2029 183.6 0.301
2030 188.3 0.276


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



 
 


wds02057-2423b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic