00455-1253 TNN 2 AC (18 Cet)

Coord 2000	00455-1253		Discov num	TNN   2		Comp	AC		Coord arcsec 2000	00 45 28.69 -12 52 50.9
Date first	2004		Date last	2016		Obs	4
Pa first	241		Pa last	241.5		P.A. Now (θ)	241.5°
Sep first	4.0		Sep last	4.089		Sep. Now (ρ)	4.089"
Mag pri	4.62		Mag sec	10.34		delta mag (ΔM)	5.72		Spectral class	G0V (yellow)
Pri motion ra	-032		Sec motion ra
Pri motion dec	-206		Sec motion dec
Notes	N V K (See Notes, Proper motion indicates physical, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		147432	00 45 29 -12 52 51	BUP 8 AB	2015	8	245	61.7	6.21	13.13	6.92
Show	18 Cet	147432	00 45 29 -12 52 51	TNN 2 AC	2016	4	242	4.1	4.62	10.34	5.72		<===

Triple system
3 estimated visually detectable stars in this system

Name	18 Cet		Constellation	Cetus		SAO	147432		HIP	3559
Tycho2	5271-00677-1		Gaia DR2	2376087581593256448		HD	4307		HR	203
GC	907		GL	GJ 1020		BD	BD-13 128		Flamsteed	18 Ceti
Flamsteed name	18 Cet		Distance	31		Distance ly	101.12