00427-3828 HDO 182 (Lam1 Scl)

Coord 2000	00427-3828		Discov num	HDO 182		Comp			Coord arcsec 2000	00 42 42.89 -38 27 48.6
Date first	1901		Date last	2017		Obs	39
Pa first	322		Pa last	24		P.A. Now (θ)	140.6°
Sep first	0.5		Sep last	0.8		Sep. Now (ρ)	0.53"
Mag pri	6.60		Mag sec	7.01		delta mag (ΔM)	0.41		Spectral class	A0V (white)
Pri motion ra	+003		Sec motion ra	+003
Pri motion dec	-010		Sec motion dec	-010
Notes	N (See Notes)

Nature of this double is uncertain.

Precise pa	24		Precise sep	0.782		Name	Lam1 Scl		Constellation	Sculptor
SAO	192690		HIP	3356		Tycho2	7532-01096-1		Gaia DR2	45362994816
HD	4065		HR	185		GC	849		CD	CD-39 175
CP	CP-39 46		Bayer	Lambda 1 Sculptoris		Bayer name	Lam1 Scl		Distance	145.14
Distance ly	473.45		last precise pa	24		last precise sep	0.782

Period (P)	840y		Periastron (T)	1989.9y		Semi-major axis (a)	1.175a
Eccentricity (e)	0.88		Inclination (i)	16.88°		Longitude of periastron (ω)	0.66°
Node (Ω)	13.06°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label rho theta 2000 0.251 103.0 2001 0.266 107.0 2002 0.282 110.6 2003 0.298 113.8 2004 0.313 116.6 2005 0.329 119.3 2006 0.344 121.6 2007 0.359 123.8 2008 0.374 125.8 2009 0.389 127.7 2010 0.404 129.4 2011 0.419 131.0 2012 0.433 132.4 2013 0.447 133.8 2014 0.462 135.1 2015 0.475 136.3 2016 0.489 137.5 2017 0.503 138.6 2018 0.516 139.6 2019 0.530 140.6 2020 0.543 141.6 2021 0.556 142.4 2022 0.569 143.3 2023 0.581 144.1 2024 0.594 144.9 2025 0.606 145.6 2026 0.619 146.4 2027 0.631 147.0 2028 0.643 147.7 2029 0.655 148.3 2030 0.667 149.0 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
00427-3828	HDO 182		1996	31	17	0.7	6.60	7.01	A0V	N D	004242.89-382748.6
00427-3828	HDO 182		2008	33	200	0.7	6.60	7.01	A0V	N D	004242.89-382748.6
00427-3828	HDO 182		2009	36	21	0.7	6.60	7.01	A0V	N D	004242.89-382748.6
00427-3828	HDO 182		2010	37	23	0.8	6.60	7.01	A0V	N	004242.89-382748.6
00427-3828	HDO 182		2017	39	24	0.8	6.60	7.01	A0V	N	004242.89-382748.6

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