00524-6930 DUN   2 (Lam1 Tuc)

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	2015		Obs	37
Pa first	77		Pa last	82		P.A. Now (θ)	15°
Sep first	22.5		Sep last	20.4		Sep. Now (ρ)	91.76"
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)

Visually invisible, K-band or other infrared star rPM=0.165 (< 0.3, Physical double) This double is physical.

Precise pa	81.5		Precise sep	20.426		Name	Lam1 Tuc		Constellation	Tucana
SAO	248269		HIP	4084		Tycho2	9135-01891-1		Gaia DR2	92046507520
HD	5190		HR	252		GC	1056		CD	CD-70 38
CP	CP-70 37		Bayer	Lambda 1 Tucanae		Bayer name	Lam1 Tuc		Distance	63.29
Distance ly	206.45		last precise pa	81.5		last precise sep	20.426

Period (P)	80000y		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	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2018

label rho theta 2000 92.054 14.9 2001 92.040 15.0 2002 92.025 15.0 2003 92.010 15.0 2004 91.995 15.0 2005 91.980 15.0 2006 91.965 15.0 2007 91.950 15.0 2008 91.936 15.0 2009 91.921 15.0 2010 91.906 15.0 2011 91.891 15.0 2012 91.876 15.0 2013 91.861 15.0 2014 91.846 15.0 2015 91.832 15.0 2016 91.817 15.0 2017 91.802 15.0 2018 91.787 15.0 2019 91.772 15.0 2020 91.757 15.0 2021 91.742 15.0 2022 91.727 15.0 2023 91.713 15.0 2024 91.698 15.0 2025 91.683 15.1 2026 91.668 15.1 2027 91.653 15.1 2028 91.638 15.1 2029 91.623 15.1 2030 91.608 15.1 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00524-6930	DUN 2		1998	29	81	20.4	6.70	7.35	F7IV-V	N D	005224.52-693013.6
00524-6930	DUN 2		2008	31	82	20.6	6.70	7.35	F7IV-V	NVD	005224.52-693013.6
00524-6930	DUN 2		2009	33	82	20.4	6.70	7.35	F7IV-V	NVD	005224.52-693013.6
00524-6930	DUN 2		2013	35	82	20.0	6.70	7.35	F7IV-V	NVD	005224.52-693013.6
00524-6930	DUN 2		2015	37	82	20.4	6.70	7.35	F7IV-V	NV	005224.52-693013.6

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