01515-1020 BUP  26AB (Zet Cet)

Coord 2000	01515-1020		Discov num	BUP  26		Comp	AB		Coord arcsec 2000	01 51 27.61 -10 20 05.8
Date first	1835		Date last	2011		Obs	13
Pa first	40		Pa last	40		P.A. Now (θ)	40°
Sep first	165.0		Sep last	188.6		Sep. Now (ρ)	188.6"
Mag pri	3.85		Mag sec	10.15		delta mag (ΔM)	6.3		Spectral class	K0III (yellow-orange)
Pri motion ra	+041		Sec motion ra	+040
Pri motion dec	-037		Sec motion dec	-009
Notes	N U (See Notes, Proper motion indicates non-physical)

Visually invisible, K-band or other infrared star rPM=0.507 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		148059	01515-1020	BNU 1	Aa,Ab	1979	1979	1	172	0.1	3.73
Show	Zet Cet	148059	01515-1020	BUP 26	AB	1835	2011	13	40	188.6	3.85	10.15	6.30		<===

Triple system
2 visible stars in this system

Precise pa	40.1		Precise sep	188.61		Name	Zet Cet		Constellation	Cetus
SAO	148059		HIP	8645		Tycho2	5278-02437-1		Gaia DR2	14559889920
HD	11353		HR	539		GC	2249		BD	BD-11 359
Bayer	Zeta Ceti		Bayer name	Zet Cet		Flamsteed	55 Ceti		Flamsteed name	55 Cet
Distance	72.05		Distance ly	235.03

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
01515-1020	BUP 26	AB	2002	11	41	188.6	3.85	10.15		D	015127.61-102005.8
01515-1020	BUP 26	AB	2011	12	40	188.6	3.85	10.15		N D	015127.61-102005.8

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