00524-6930 DUN 2 (Lam1 Tuc)

 
 
00h 52m 24.52s -69° 30' 13.6" P.A. 83.00 sep 20.5 mag 6.70,7.35 Sp F7IV-V dist. 63.29 pc (206.45 l.y.)
 
 
Coord 2000 00524-6930 Discov num DUN   2 Comp Coord arcsec 2000 00 52 24.52 -69 30 13.6
Date first 1834 Date last 2021 Obs 39
Pa first 77 Pa last 82.7 P.A. Now (θ) 82.7°
Sep first 22.5 Sep last 20.53 Sep. Now (ρ) 20.53"
Mag pri 6.70 Mag sec 7.35 delta mag (ΔM) 0.65 Spectral class F7IV-V (yellow-white)
Pri motion ra +004 Sec motion ra -003
Pri motion dec -069 Sec motion dec -060
Notes N V (See Notes, Proper motion indicates physical)
rPM=0.165 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Lam1 Tuc Var name NSV334 Tuc Constellation Tucana SAO 248269
HIP 4084 Tycho2 9135-01891-1 Gaia DR2 4691995692046507520 HD 5190
HR 252 GC 1056 DM CP-70 38 CD CD-70 38
CP CP-70 37 Bayer Lambda 1 Tucanae Bayer name Lam1 Tuc Distance 63.29
Distance ly 206.45 Bayer greek λ1 Tuc
 
 
ORBITAL ELEMENTS
 
 
Period (P)5800c Periastron (T)6100y± 800 Semi-major axis (a)170a± 11
Eccentricity (e)0.74± 0.02 Inclination (i)66.4°± 0.5 Longitude of periastron (ω)105°± 4
Node (Ω)14.1°± 0.9 Notes ReferenceLRR2018b
Equinox2000 Last observation2018 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 81.1 19.719
2001 81.1 19.717
2002 81.1 19.716
2003 81.1 19.714
2004 81.1 19.712
2005 81.1 19.710
2006 81.1 19.708
2007 81.2 19.706
2008 81.2 19.705
2009 81.2 19.703
2010 81.2 19.701
2011 81.2 19.699
2012 81.2 19.697
2013 81.2 19.695
2014 81.2 19.694
2015 81.3 19.692
2016 81.3 19.690
2017 81.3 19.688
2018 81.3 19.686
2019 81.3 19.684
2020 81.3 19.683
2021 81.3 19.681
2022 81.3 19.679
2023 81.4 19.677
2024 81.4 19.675
2025 81.4 19.673
2026 81.4 19.672
2027 81.4 19.670
2028 81.4 19.668
2029 81.4 19.666
2030 81.4 19.664


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



 
 


wds00524-6930a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic