20047+6353 STF2640AB

Coord 2000	20047+6353		Discov num	STF2640		Comp	AB		Coord arcsec 2000	20 04 44.51 +63 53 24.4
Date first	1832		Date last	2019		Obs	78
Pa first	27		Pa last	14		P.A. Now (θ)	14°
Sep first	4.9		Sep last	5.7		Sep. Now (ρ)	5.7"
Mag pri	6.29		Mag sec	9.54		delta mag (ΔM)	3.25		Spectral class	A2II-III (white)
Pri motion ra	+003		Sec motion ra	+003
Pri motion dec	+038		Sec motion dec	+038
Notes

Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		18692	20047+6353	STF2640	AB	1832	2019	78	14	5.7	6.29	9.54	3.25		<===
Show		18692	20047+6353	STF2640	AC	1880	2003	9	81	153.0	6.29	11.42	5.13

Triple system
3 visible stars in this system

Precise pa	13.6		Precise sep	5.728		Constellation	Draco		SAO	18692
HIP	98872		Tycho2	4240-01067-1		Gaia DR2	02453812992		HD	191174
HR	7695		BD	BD+63 1593		Distance	79.18		Distance ly	258.29

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20047+6353	STF2640	AB	2005	64	17	5.5	6.29	9.54	A2II-III	D	200444.51+635324.4
20047+6353	STF2640	AB	2006	66	15	5.7	6.29	9.54	A2II-III	D	200444.51+635324.4
20047+6353	STF2640	AB	2010	68	17	5.4	6.29	9.54	A2II-III		200444.51+635324.4
20047+6353	STF2640	AB	2013	73	14	5.7	6.29	9.54	A2II-III		200444.51+635324.4
20047+6353	STF2640	AB	2019	78	14	5.7	6.29	9.54	A2II-III		200444.51+635324.4

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