21424+1750 BU  691AE

Coord 2000	21424+1750		Discov num	BU  691		Comp	AE		Coord arcsec 2000	21 42 25.22 +17 50 09.5
Date first	1900		Date last	2015		Obs	12
Pa first	68		Pa last	80		P.A. Now (θ)	80°
Sep first	90.3		Sep last	118.8		Sep. Now (ρ)	118.8"
Mag pri	8.90		Mag sec	12.30		delta mag (ΔM)	3.4		Spectral class	K0 (yellow-orange)
Pri motion ra	+024		Sec motion ra	+264
Pri motion dec	-006		Sec motion dec	-112
Notes	N U (See Notes, Proper motion indicates non-physical)

rPM=0.915 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		107339	21 42 25 +17 50 10	HU 373 AB	2011	17	300	0.9	8.90	10.44	1.54
Show		107339	21 42 25 +17 50 10	BU 691 AC	2015	9	249	84.3	8.90	12.53	3.63
Show		107339	21 42 25 +17 50 10	BU 691 AE	2015	12	80	118.8	8.90	12.30	3.40		<===
Show		107339	21 42 20 +17 49 39	FOX 9057 CD	2015	8	238	14.7	11.70	12.30	0.60

Quintuple system
5 visible stars in this system

Precise pa	79.6		Precise sep	118.77		Constellation	Pegasus		SAO	107339
Tycho2	1669-00828-1		Gaia DR2	1774144371710713856		HD	206556

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21424+1750	BU 691	AE	2001	6	79	115.4	8.90	12.30		NU	214225.22+175009.5
21424+1750	BU 691	AE	2015	8	80	118.8	8.90	12.30	K0	NU	214225.22+175009.5

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