01361-2954 HJ 3447 (Tau Scl)

 
 
01h 36m 08.50s -29 54' 26.5" P.A. 201.00 sep 0.8 mag 5.97,7.35 Sp F2V dist. 69.35 pc (226.22 l.y.)
 
 
Coord 2000 01361-2954 Discov num HJ 3447 Comp Coord arcsec 2000 01 36 08.50 -29 54 26.5
Date first 1835 Date last 2021 Obs 122
Pa first 254 Pa last 200.5 P.A. Now (θ) 200.5°
Sep first 3.0 Sep last 0.832 Sep. Now (ρ) 0.832"
Mag pri 5.97 Mag sec 7.35 delta mag (ΔM) 1.38 Spectral class F2V (yellow-white)
Pri motion ra +105 Sec motion ra +105
Pri motion dec +038 Sec motion dec +038
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Tau Scl Constellation Sculptor SAO 193201 HIP 7463
Tycho2 6428-02436-1 Gaia DR2 5022876291741784064 HD 9906 HR 462
GC 1947 CD CD-30 540 CP CP-30 186 Bayer Tau Sculptoris
Bayer name Tau Scl Distance 69.35 Distance ly 226.22 Bayer greek τ Scl
 
 
ORBITAL ELEMENTS
 
 
Period (P)679.9164y± 280.5184 Periastron (T)2049.609y± 11.3345 Semi-major axis (a)2.73159a± 0.85307
Eccentricity (e)0.75614± 0.17019 Inclination (i)67.832°± 9.489 Longitude of periastron (ω)220.95°± 28.609
Node (Ω)50.738°± 8.08 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 167.7 0.783
2001 169.3 0.782
2002 170.9 0.781
2003 172.5 0.781
2004 174.1 0.781
2005 175.7 0.781
2006 177.3 0.782
2007 178.9 0.783
2008 180.4 0.785
2009 182.0 0.786
2010 183.6 0.788
2011 185.2 0.791
2012 186.7 0.793
2013 188.3 0.796
2014 189.8 0.799
2015 191.3 0.802
2016 192.8 0.805
2017 194.3 0.808
2018 195.8 0.812
2019 197.3 0.815
2020 198.8 0.819
2021 200.2 0.822
2022 201.6 0.825
2023 203.1 0.828
2024 204.5 0.831
2025 205.9 0.834
2026 207.3 0.836
2027 208.7 0.838
2028 210.1 0.839
2029 211.5 0.840
2030 212.8 0.840


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



 
 


wds01361-2954c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic