19513+2308 CHE 166AB

Coord 2000	19513+2308		Discov num	CHE 166		Comp	AB		Coord arcsec 2000	19 50 57.10 +23 07 33.5
Date first	1895		Date last	2015		Obs	11
Pa first	256		Pa last	257		P.A. Now (θ)	257°
Sep first	12.0		Sep last	11.8		Sep. Now (ρ)	11.8"
Mag pri	11.50		Mag sec	12.30		delta mag (ΔM)	0.8		Spectral class
Pri motion ra	+001		Sec motion ra	+002
Pri motion dec	-007		Sec motion dec	-001
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.86 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			19513+2308	CHE 166	AB	1895	2015	11	257	11.8	11.50	12.30	0.80		<===
Show			19513+2308	CHE 166	AC	1907	2015	8	15	19.5	11.50	12.70	1.20
Show			19513+2308	BKO 997	CD	2000	2015	7	19	12.6	12.70	15.70	3.00

Quadruple system
4 visible stars in this system

Precise pa	256.9		Precise sep	11.769		Constellation	Vulpecula		Tycho2	2140-02865-1
Gaia DR2	05911947008

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19513+2308	CHE 166	AB	1907	1	257	11.6	11.50	12.30			195115.11+230839.2
19513+2308	CHE 166	AB	2008	3	257	11.7	11.50	12.30		N	195057.10+230733.5
19513+2308	CHE 166	AB	2012	5	257	11.6	11.50	12.30		N	195057.10+230733.5
19513+2308	CHE 166	AB	2015	7	257	11.8	11.50	12.30		N	195057.10+230733.5

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