20186+2833 HJ 1501AB

Coord 2000	20186+2833		Discov num	HJ 1501		Comp	AB		Coord arcsec 2000	20 18 38.40 +28 31 59.0
Date first	1828		Date last	2015		Obs	10
Pa first	0		Pa last	355		P.A. Now (θ)	355°
Sep first	5.0		Sep last	12.9		Sep. Now (ρ)	12.9"
Mag pri	10.18		Mag sec	11.10		delta mag (ΔM)	0.92		Spectral class	A2 (white)
Pri motion ra	+002		Sec motion ra	-007
Pri motion dec	-008		Sec motion dec	-010
Notes

rPM=0.755 Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 18 38 +28 31 59	HJ 1501 AB	2015	10	355	12.9	10.18	11.10	0.92		<===
Show			20 18 38 +28 31 59	HJ 1501 AC	2015	11	349	57.3	10.18	11.71	1.53
Show			20 18 38 +28 32 56	HJ 1501 CD	2015	9	12	20.2	11.71	13.70	1.99

Quadruple system
4 visible stars in this system

Precise pa	354.7		Precise sep	12.943		Constellation	Hydra		Tycho2	2167-01256-1
Gaia DR2	1837099830535525888		HD	334120

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20186+2833	HJ 1501	AB	1998	3	355	12.8	10.18	11.10	A2	D	201838.40+283159.0
20186+2833	HJ 1501	AB	2002	5	355	12.9	10.18	11.10	A2	D	201838.40+283159.0
20186+2833	HJ 1501	AB	2010	6	355	12.5	10.18	11.10	A2		201838.40+283159.0
20186+2833	HJ 1501	AB	2015	6	355	12.9	10.18	11.10	A2		201838.40+283159.0

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