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00427-3828
HDO 182
Lam1 Scl

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

00427-3828 HDO 182 (Lam1 Scl)

00^h 42^m 42.89^s -38° 27' 48.6" P.A. 142.40 sep 0.6 mag 6.60,7.01 Sp A0V dist. 145.14 pc (473.45 l.y.)

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	41
Pa first	322		Pa last	24		P.A. Now (θ)	142.4°
Sep first	0.5		Sep last	0.7		Sep. Now (ρ)	0.56"
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.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	23.7		Precise sep	0.665		Name	Lam1 Scl		Constellation	Sculptor
SAO	192690		HIP	3356		Tycho2	7532-01096-1		Gaia DR2	5000371045362994816
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	23.7		last precise sep	0.665

ORBITAL ELEMENTS

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

grafico orbita

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

wds00427-3828a.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS HISTORIC DATA

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

If you need more information about this double, apply for a data request form to the WDS.