20168+3942 STF2663AB

Coord 2000	20168+3942		Discov num	STF2663		Comp	AB		Coord arcsec 2000	20 16 48.53 +39 41 50.4
Date first	1831		Date last	2018		Obs	39
Pa first	325		Pa last	323		P.A. Now (θ)	323°
Sep first	5.3		Sep last	5.4		Sep. Now (ρ)	5.4"
Mag pri	8.20		Mag sec	8.66		delta mag (ΔM)	0.46		Spectral class	A0II (white)
Pri motion ra	+002		Sec motion ra	+003
Pri motion dec	-004		Sec motion dec	-003
Notes

rPM=0.316 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			20168+3942	STF2663	AB	1831	2018	39	323	5.4	8.20	8.66	0.46		<===
Show			20168+3942	CTT 21	AC	1896	2011	4	188	104.0	8.20	11.70	3.50
Show			20168+3942	DAM1040	AF	1994	1998	2	123	22.3	8.20	14.00	5.80
Show			20168+3942	DAM1040	FG	1998	2015	4	225	3.5	14.00	15.10	1.10

Quintuple system
5 visible stars in this system

Precise pa	322.9		Precise sep	5.424		Constellation	Cygnus		SAO	69749
HIP	99954		Tycho2	3155-01740-1		Gaia DR2	10796030080		HD	193063
BD	BD+39 4113		Distance	2702.7		Distance ly	8816.21

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20168+3942	STF2663	AB	2011	37	324	5.4	8.20	8.66	A0II	D	201648.53+394150.4
20168+3942	STF2663	AB	2018	39	323	5.4	8.20	8.66	A0II		201648.53+394150.4

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