20120+2100 HJ  907AB

Coord 2000	20120+2100		Discov num	HJ  907		Comp	AB		Coord arcsec 2000	20 12 02.35 +20 59 06.1
Date first	1827		Date last	2015		Obs	18
Pa first	130		Pa last	137		P.A. Now (θ)	137°
Sep first	5.0		Sep last	5.7		Sep. Now (ρ)	5.7"
Mag pri	9.77		Mag sec	10.33		delta mag (ΔM)	0.56		Spectral class	K2 (yellow-orange)
Pri motion ra	+066		Sec motion ra	-016
Pri motion dec	+072		Sec motion dec	+108
Notes

rPM=0.82 This double is not physical.

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	137.2		Precise sep	5.658		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	AB	2000	11	136	5.7	9.77	10.33	K2	D	201202.35+205906.1
20120+2100	HJ 907	AB	2008	12	137	5.7	9.77	10.33	K2	D	201202.35+205906.1
20120+2100	HJ 907	AB	2013	14	137	5.7	9.77	10.33	K2		201202.35+205906.1
20120+2100	HJ 907	AB	2015	15	137	5.7	9.77	10.33	K2		201202.35+205906.1

If you need more information about this double, apply for a data request form to the WDS.