20283+1846 HO  131AB

Coord 2000	20283+1846		Discov num	HO  131		Comp	AB		Coord arcsec 2000	20 28 18.64 +18 46 10.2
Date first	1881		Date last	2015		Obs	14
Pa first	323		Pa last	334		P.A. Now (θ)	334°
Sep first	4.5		Sep last	3.4		Sep. Now (ρ)	3.4"
Mag pri	6.97		Mag sec	10.60		delta mag (ΔM)	3.63		Spectral class	G1V (yellow)
Pri motion ra	+349		Sec motion ra
Pri motion dec	-058		Sec motion dec
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		106138	20283+1846	HO 131	AB	1881	2015	14	334	3.4	6.97	10.60	3.63		<===
Show		106138	20283+1846	HO 131	AC	1895	2020	14	69	64.4	6.97	11.39	4.42
Show		106138	20283+1846	HO 131	AD	1984	2020	5	97	76.9	6.97	11.77	4.80

Quadruple system
4 visible stars in this system

Precise pa	333.9		Precise sep	3.389		Constellation	Delphinus		SAO	106138
HIP	100970		Tycho2	1640-00113-1		Gaia DR2	18365857792		HD	195019
BD	BD+18 4505		Distance	38.52		Distance ly	125.65

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20283+1846	HO 131	AB	1988	12	330	3.5	6.97	10.60	G1V	N V	202818.42+184610.7
20283+1846	HO 131	AB	2002	13	331	3.5	6.97	10.60	G1V	NVD	202818.42+184610.7
20283+1846	HO 131	AB	2015	14	334	3.4	6.97	10.60	G1V	NV	202818.64+184610.2

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