19563+3505 BU  980AB (Eta Cyg)

Coord 2000	19563+3505		Discov num	BU  980		Comp	AB		Coord arcsec 2000	19 56 18.40 +35 05 00.6
Date first	1879		Date last	2017		Obs	17
Pa first	209		Pa last	206		P.A. Now (θ)	206°
Sep first	7.2		Sep last	7.2		Sep. Now (ρ)	7.2"
Mag pri	3.89		Mag sec	12.00		delta mag (ΔM)	8.11		Spectral class	K0III (yellow-orange)
Pri motion ra	-034		Sec motion ra
Pri motion dec	-028		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Eta Cyg	69116	19 56 18 +35 05 01	BU 980 AB	2017	17	206	7.2	3.89	12.00	8.11		<===
Show		69116	19 56 18 +35 05 01	HJ 1455 AC	2016	14	333	45.9	3.89	10.50	6.61
Show		69116	19 56 18 +35 05 01	HJ 1455 AD	2016	12	163	47.5	3.89	10.40	6.51
Show		69116	19 56 18 +35 05 01	BU 980 AE	2016	8	247	56.5	3.89	11.50	7.61
Show		69116	19 56 17 +35 05 41	BU 980 CE	2015	6	206	70.3	12.50	12.90	0.40
Show		69116	19 56 17 +35 05 41	BU 980 CF	2013	2	264	8.3	12.50	14.70	2.20

Sextuple system
6 visible stars in this system

Precise pa	206.3		Precise sep	7.15		Name	Eta Cyg		Constellation	Cygnus
SAO	69116		HIP	98110		Tycho2	2677-01816-1		Gaia DR2	2059372363881617536
HD	188947		HR	7615		GC	27622		BD	BD+34 3798
Bayer	Eta Cygni		Bayer name	Eta Cyg		Flamsteed	21 Cygni		Flamsteed name	21 Cyg
Distance	41.37		Distance ly	134.95

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19563+3505	BU 980	AB	2007	14	206	7.8	3.89	12.00	K0III	N	195618.40+350500.6
19563+3505	BU 980	AB	2016	15	206	7.2	3.89	12.00	K0III	N	195618.40+350500.6
19563+3505	BU 980	AB	2017	16	206	7.2	3.89	12.00	K0III	N	195618.40+350500.6

If you need more information about this double, apply for a data request form to the WDS.