01198-0031 STF 113 A,BC (42 Cet)

 
 
01h 19m 48.30s -00 30' 32.5" P.A. 21.00 sep 1.6 mag 6.45,6.99 Sp A2V+G4III dist. 100.7 pc (328.48 l.y.)
 
 
Coord 2000 01198-0031 Discov num STF 113 Comp A,BC Coord arcsec 2000 01 19 48.30 -00 30 32.5
Date first 1829 Date last 2021 Obs 334
Pa first 331 Pa last 21.4 P.A. Now (θ) 21.4°
Sep first 1.3 Sep last 1.582 Sep. Now (ρ) 1.582"
Mag pri 6.45 Mag sec 6.99 delta mag (ΔM) 0.54 Spectral class A2V+G4III (white/yellow)
Pri motion ra +014 Sec motion ra +014
Pri motion dec -016 Sec motion dec -016
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
01198-0031 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 42 Cet 129235 01 19 48 -00 30 32 STF 113 A,BC 2021 334 21 1.6 6.45 6.99 0.54 Y <===
Show 129235 01 19 48 -00 30 31 FIN 337 BC 2021 89 16 0.1 7.40 7.60 0.20 Y
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 42 Cet Constellation Cetus SAO 129235 HIP 6226
Tycho2 4682-01383-2 HD 8036 HR 385 GC 1600
ADS 1081 BD BD-01 171 Flamsteed 42 Ceti Flamsteed name 42 Cet
Distance 100.7 Distance ly 328.48
 
 
ORBITAL ELEMENTS
 
 
Period (P)650y Periastron (T)1686y Semi-major axis (a)1.324a
Eccentricity (e)0.64 Inclination (i)43.5° Longitude of periastron (ω)106.7°
Node (Ω)87.2° Notesn ReferenceZir2015a
Equinox2000 Last observation2013 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 17.4 1.620
2001 17.6 1.621
2002 17.8 1.623
2003 18.0 1.624
2004 18.2 1.625
2005 18.4 1.626
2006 18.7 1.627
2007 18.9 1.628
2008 19.1 1.629
2009 19.3 1.630
2010 19.5 1.632
2011 19.7 1.633
2012 19.9 1.634
2013 20.1 1.635
2014 20.3 1.636
2015 20.5 1.637
2016 20.7 1.638
2017 20.9 1.639
2018 21.1 1.639
2019 21.3 1.640
2020 21.5 1.641
2021 21.7 1.642
2022 21.9 1.643
2023 22.1 1.644
2024 22.3 1.645
2025 22.5 1.646
2026 22.7 1.647
2027 22.9 1.647
2028 23.1 1.648
2029 23.3 1.649
2030 23.5 1.650


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



 
 


wds01198-0031a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic