20144+4206 STF2657AC

Coord 2000	20144+4206		Discov num	STF2657		Comp	AC		Coord arcsec 2000	20 14 21.53 +42 06 15.6
Date first	1828		Date last	2015		Obs	38
Pa first	33		Pa last	32		P.A. Now (θ)	32°
Sep first	9.0		Sep last	11.6		Sep. Now (ρ)	11.6"
Mag pri	7.28		Mag sec	9.80		delta mag (ΔM)	2.52		Spectral class	B9IV-V (blue-white)
Pri motion ra	+004		Sec motion ra	+004
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	96	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	31.5		Precise sep	11.6		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	STF2657	AC	2000	33	32	11.8	7.28	9.80		D	201421.53+420615.6
20144+4206	STF2657	AC	2002	36	32	11.9	7.28	9.80		D	201421.53+420615.6
20144+4206	STF2657	AC	2015	37	32	11.6	7.28	9.80	B9IV-V		201421.53+420615.6

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