20144+1608 CHE 228AC

Coord 2000	20144+1608		Discov num	CHE 228		Comp	AC		Coord arcsec 2000	20 14 24.25 +16 08 18.9
Date first	1910		Date last	2015		Obs	9
Pa first	269		Pa last	268		P.A. Now (θ)	268°
Sep first	24.9		Sep last	24.4		Sep. Now (ρ)	24.4"
Mag pri	11.19		Mag sec	13.96		delta mag (ΔM)	2.77		Spectral class
Pri motion ra	+006		Sec motion ra	-025
Pri motion dec	+002		Sec motion dec	-020
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.187 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20144+1608	CHE 228	AB	1910	2015	11	309	38.6	11.19	13.29	2.10
Show			20144+1608	CHE 228	AC	1910	2015	9	268	24.4	11.19	13.96	2.77		<===
Show			20144+1608	BKO 540	BD	1998	2015	8	134	9.9	13.40	14.00	0.60

Quadruple system
4 visible stars in this system

Precise pa	267.7		Precise sep	24.396		Constellation	Sagitta		Tycho2	1618-01497-1
Gaia DR2	77482051200		HD	355218

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20144+1608	CHE 228	AC	2002	3	268	24.3	9.63	11.50		D	201424.25+160819.6
20144+1608	CHE 228	AC	2008	4	268	24.2	9.63	11.50		D	201424.24+160819.0
20144+1608	CHE 228	AC	2015	6	268	24.4	11.19	13.96		N	201424.25+160818.9

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