19401+1801 J   121AC

Coord 2000	19401+1801		Discov num	J   121		Comp	AC		Coord arcsec 2000	19 40 05.78 +18 00 50.2
Date first	1910		Date last	2013		Obs	5
Pa first	249		Pa last	244		P.A. Now (θ)	244°
Sep first	35.8		Sep last	35.4		Sep. Now (ρ)	35.4"
Mag pri	4.37		Mag sec	14.90		delta mag (ΔM)	10.53		Spectral class	G1III (yellow)
Pri motion ra	+015		Sec motion ra
Pri motion dec	-020		Sec motion dec
Notes	N (See Notes)

Visually invisible, K-band or other infrared star Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Sham	105120	19401+1801	J 121	AB	1910	2015	11	180	28.9	4.37	13.20	8.83
Show		105120	19401+1801	J 121	AC	1910	2013	5	244	35.4	4.37	14.90	10.53		<===
Show		105120	19401+1801	WAL 118	AD	1897	2013	7	148	82.6	4.37	11.21	6.84

Quadruple system
4 visible stars in this system

Precise pa	243.9		Precise sep	35.35		Constellation	Sagitta		SAO	105120
HIP	96757		Tycho2	1606-02341-1		Gaia DR2	55360974720		HD	185758
HR	7479		GC	27215		BD	BD+17 4042		Bayer	Alpha Sagittae
Bayer name	Alp Sge		Flamsteed	5 Sagittae		Flamsteed name	5 Sge		Distance	130.38
Distance ly	425.3

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19401+1801	J 121	AC	2007	3	242	35.6	4.37	14.90	G1III	N D	194005.78+180050.2
19401+1801	J 121	AC	2013	5	244	35.4	4.37	14.90	G1III	N	194005.78+180050.2

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