19307+2758 STFA 43AB (Albireo)

Coord 2000	19307+2758		Discov num	STFA 43		Comp	AB		Coord arcsec 2000	19 30 43.29 +27 57 34.9
Date first	1755		Date last	2020		Obs	289
Pa first	58		Pa last	54		P.A. Now (θ)	54°
Sep first	34.2		Sep last	34.9		Sep. Now (ρ)	34.9"
Mag pri	3.19		Mag sec	4.68		delta mag (ΔM)	1.49		Spectral class	K3II+B9.5 (yellow-orange/blue-white)
Pri motion ra	+006		Sec motion ra	-001
Pri motion dec	-015		Sec motion dec	-001
Notes	N S (See Notes, Parallax indidates non-physical)

rPM=0.969 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		87301	19 30 43 +27 57 35	BNU 10 Aa,Ab	1995	2	160	0.0	3.37	5.00	1.63
Show		87301	19 30 43 +27 57 35	MCA 55 Aa,Ac	2021	62	239	0.4	3.37	5.16	1.79	Y
Show	Albireo	87301	19 30 43 +27 57 35	STFA 43 AB	2020	289	54	34.9	3.19	4.68	1.49		<===
Show		87301	19 30 43 +27 57 35	WAL 114 AC	2017	11	341	65.6	3.19	10.99	7.80
Show		87301	19 30 43 +27 57 35	CTT 17 AD	2017	11	33	108.4	3.19	12.24	9.05
Show		87301	19 30 43 +27 57 35	CTT 18 AE	2017	11	207	76.7	3.19	11.81	8.62
Show		87301	19 30 43 +27 57 35	SMR 34 AF	2017	7	46	59.2	3.19	12.00	8.81
Show		87301	19 30 43 +27 57 35	SMR 34 AG	2015	6	45	161.8	3.19	12.50	9.31
Show		87301	19 30 43 +27 57 35	SMR 34 AH	2017	7	119	54.5	3.19	12.50	9.31
Show		87301	19 30 43 +27 57 35	SMR 34 AI	2017	6	132	38.0	3.19	12.50	9.31
Show		87301	19 30 43 +27 57 35	SMR 34 AJ	2017	5	141	140.6	3.19	10.00	6.81
Show		87301	19 30 43 +27 57 35	SMR 34 AK	2015	6	277	142.5	3.19	11.50	8.31
Show		87301	19 30 43 +27 57 35	SMR 34 AL	2012	1	269	12.0	3.19	11.50	8.31
Show		87302	19 30 45 +27 57 55	RBR 12 Ba,Bb	-1	0			5.10	9.20	4.10

15-fold system
12 visible stars in this system

Precise pa	53.6		Precise sep	34.89		Common name	Albireo		Meaning	the hen's beak
Constellation	Cygnus		SAO	87301		HIP	95947		Tycho2	2133-02964-1
Gaia DR2	2026116260302988160		HD	183912		HR	7417		GC	26953
BD	BD+27 3410		Bayer	Beta 1 Cygni		Bayer name	Bet1 Cyg		Flamsteed	6 Cygni
Flamsteed name	6 Cyg		Distance	133.16		Distance ly	434.37

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19307+2758	STFA 43	AB	2008	252	56	37.1	3.19	4.68		NZD	193043.29+275734.9
19307+2758	STFA 43	AB	2009	258	55	34.6	3.19	4.68		NZD	193043.29+275734.9
19307+2758	STFA 43	AB	2010	260	54	34.3	3.19	4.68		NZD	193043.29+275734.9
19307+2758	STFA 43	AB	2012	266	55	35.4	3.19	4.68		NZD	193043.29+275734.9
19307+2758	STFA 43	AB	2014	273	54	34.3	3.19	4.68	K3II+B9.5	NZD	193043.29+275734.9
19307+2758	STFA 43	AB	2016	277	54	34.7	3.19	4.68	K3II+B9.5	NZ	193043.29+275734.9
19307+2758	STFA 43	AB	2017	278	54	34.6	3.19	4.68	K3II+B9.5	NZ	193043.29+275734.9
19307+2758	STFA 43	AB	2018	280	55	34.7	3.19	4.68	K3II+B9.5	NS	193043.29+275734.9
19307+2758	STFA 43	AB	2019	286	54	35.2	3.19	4.68	K3II+B9.5	NS	193043.29+275734.9
19307+2758	STFA 43	AB	2020	288	54	34.6	3.19	4.68	K3II+B9.5	NS	193043.29+275734.9

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