20144+4206 STT 403AB

Coord 2000	20144+4206		Discov num	STT 403		Comp	AB		Coord arcsec 2000	20 14 21.53 +42 06 15.6
Date first	1843		Date last	2019		Obs	97
Pa first	168		Pa last	171		P.A. Now (θ)	171°
Sep first	0.6		Sep last	0.9		Sep. Now (ρ)	0.9"
Mag pri	7.31		Mag sec	7.64		delta mag (ΔM)	0.33		Spectral class	B9IV-V (blue-white)
Pri motion ra	+002		Sec motion ra	+002
Pri motion dec	-002		Sec motion dec	-002
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		49345	20144+4206	STT 403	AB	1843	2019	97	171	0.9	7.31	7.64	0.33		<===
Show		49345	20144+4206	STF2657	AC	1828	2015	38	32	11.6	7.28	9.80	2.52

Triple system
3 visible stars in this system

Precise pa	170.8		Precise sep	0.932		Constellation	Cygnus		SAO	49345
HIP	99749		Tycho2	3159-01225-1		Gaia DR2	45889489664		HD	192659
HR	7737		BD	BD+41 3668		Distance	581.4		Distance ly	1896.53

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20144+4206	STT 403	AB	2005	94	171	0.9	7.31	7.64	B9IV-V	D	201421.53+420615.6
20144+4206	STT 403	AB	2009	97	171	0.9	7.31	7.64	B9IV-V	D	201421.53+420615.6
20144+4206	STT 403	AB	2013	100	171	0.9	7.31	7.64	B9IV-V	D	201421.53+420615.6
20144+4206	STT 403	AB	2015	94	172	0.9	7.31	7.64	B9IV-V		201421.53+420615.6
20144+4206	STT 403	AB	2016	95	171	1.0	7.31	7.64	B9IV-V		201421.53+420615.6
20144+4206	STT 403	AB	2019	96	171	0.9	7.31	7.64	B9IV-V		201421.53+420615.6

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