05320-0018 BU  558AB (Mintaka)

Coord 2000	05320-0018		Discov num	BU  558		Comp	AB		Coord arcsec 2000	05 32 00.40 -00 17 56.7
Date first	1877		Date last	2016		Obs	10
Pa first	227		Pa last	229		P.A. Now (θ)	229°
Sep first	33.8		Sep last	33.4		Sep. Now (ρ)	33.4"
Mag pri	2.41		Mag sec	14.20		delta mag (ΔM)	11.79		Spectral class	O9.5II+ (blue)
Pri motion ra	+002		Sec motion ra	-009
Pri motion dec	+001		Sec motion dec	+005
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.137 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		132220	05320-0018	HEI 42	Aa,Ab	1978	2019	43	128	0.3	2.41	3.76	1.35	Y
Show	Mintaka	132220	05320-0018	BU 558	AB	1877	2016	10	229	33.4	2.41	14.20	11.79		<===
Show		132221	05320-0018	STFA 14	AC	1777	2017	78	4	56.2	2.41	6.83	4.42

Quadruple system
3 visible stars in this system

Precise pa	228.7		Precise sep	33.42		Common name	Mintaka		Meaning	belt
Other names	MINTIKA		Constellation	Orion		SAO	132220		HD	36486
HR	1852		DM	BD-00 983		Flamsteed	34 Orionis		Flamsteed name	34 Ori

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
05320-0018	BU 558	AB	1998	6	228	33.2	2.41	14.20	B0III	D	053200.40-001756.7
05320-0018	BU 558	AB	2008	7	228	33.4	2.41	14.20	B0III	D	053200.40-001756.7
05320-0018	BU 558	AB	2014	9	229	33.0	2.41	14.20	B0III	N	053200.40-001756.7
05320-0018	BU 558	AB	2016	10	229	33.4	2.41	14.20	B0III	N	053200.40-001756.7

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