20183+2002 HJ  912AC

Coord 2000	20183+2002		Discov num	HJ  912		Comp	AC		Coord arcsec 2000	20 18 17.00 +20 01 42.9
Date first	1904		Date last	2015		Obs	14
Pa first	169		Pa last	170		P.A. Now (θ)	170°
Sep first	86.6		Sep last	89.6		Sep. Now (ρ)	89.6"
Mag pri	10.65		Mag sec	9.02		delta mag (ΔM)	1.63		Spectral class
Pri motion ra	+001		Sec motion ra	-006
Pri motion dec	-002		Sec motion dec	-031
Notes

rPM=0.945 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		105942	20 18 17 +20 01 43	HJ 912 AB	2015	18	78	5.1	10.65	10.53	0.12
Show		105942	20 18 17 +20 01 43	HJ 912 AC	2015	14	170	89.6	10.65	9.02	1.63		<===

Triple system
3 visible stars in this system

Precise pa	169.6		Precise sep	89.645		Constellation	Sagitta		SAO	105942
Tycho2	1639-00598-1		Gaia DR2	1816588136189590656

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20183+2002	HJ 912	AC	2005	6	170	88.4	10.65	9.02			201817.00+200142.9
20183+2002	HJ 912	AC	2009	7	170	89.4	10.65	9.02			201817.00+200142.9
20183+2002	HJ 912	AC	2014	10	170	88.5	10.65	9.02			201817.00+200142.9
20183+2002	HJ 912	AC	2015	11	170	89.6	10.65	9.02			201817.00+200142.9

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