20120+2100 HJ  907AC

Coord 2000	20120+2100		Discov num	HJ  907		Comp	AC		Coord arcsec 2000	20 12 02.35 +20 59 06.1
Date first	1903		Date last	2015		Obs	9
Pa first	245		Pa last	229		P.A. Now (θ)	229°
Sep first	8.8		Sep last	20.1		Sep. Now (ρ)	20.1"
Mag pri	9.77		Mag sec	14.30		delta mag (ΔM)	4.53		Spectral class	K2 (yellow-orange)
Pri motion ra	+066		Sec motion ra
Pri motion dec	+072		Sec motion dec
Notes

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 12 02 +20 59 06	HJ 907 AB	2015	18	137	5.7	9.77	10.33	0.56
Show			20 12 02 +20 59 06	HJ 907 AC	2015	9	229	20.1	9.77	14.30	4.53		<===

Triple system
3 visible stars in this system

Precise pa	229.2		Precise sep	20.111		Constellation	Sagitta		Tycho2	1630-00880-1
Gaia DR2	1828856383861873920		HD	351541

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20120+2100	HJ 907	AC	1903	1	245	8.8	9.77	14.30	K2		201202.35+205906.1
20120+2100	HJ 907	AC	2008	2	230	19.4	9.77	14.30	K2		201202.35+205906.1
20120+2100	HJ 907	AC	2015	5	229	20.1	9.77	14.30	K2		201202.35+205906.1

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