19450+4508 STF2579AC

Coord 2000	19450+4508		Discov num	STF2579		Comp	AC		Coord arcsec 2000	19 44 58.44 +45 07 50.5
Date first	1913		Date last	2017		Obs	8
Pa first	66		Pa last	67		P.A. Now (θ)	67°
Sep first	68.2		Sep last	62.5		Sep. Now (ρ)	62.5"
Mag pri	2.89		Mag sec	12.00		delta mag (ΔM)	9.11		Spectral class	B9.5IV (blue-white)
Pri motion ra	+043		Sec motion ra
Pri motion dec	+048		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	Del Cyg	48796	19 44 58 +45 07 50	STF 2579 AB	2020	488	214	2.8	2.89	6.27	3.38	Y
Show		48796	19 44 58 +45 07 50	STF 2579 AC	2017	8	67	62.5	2.89	12.00	9.11		<===
Show		48796	19 44 58 +45 07 50	DAL 37 AD	2007	3	246	42.0	2.89	14.80	11.91
Show		48796	19 44 58 +45 07 50	DAL 37 AF	2007	3	66	147.5	2.89	12.80	9.91
Show		48796	19 44 55 +45 07 35	DAL 37 DE	2015	4	251	3.5	14.80	15.20	0.40
Show		48796	19 45 11 +45 08 51	DAL 37 FG	2016	3	312	3.1	13.00	13.80	0.80

Septuple system
7 visible stars in this system

Precise pa	67.1		Precise sep	62.533		Constellation	Cygnus		SAO	48796
HIP	97165		Gaia DR2	2079784487999414656		HD	186882		HR	7528
GC	27347		BD	BD+44 3234		Flamsteed	18 Cygni		Flamsteed name	18 Cyg
Distance	50.58		Distance ly	164.99

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19450+4508	STF2579	AC	2007	4	67	63.0	2.89	12.00	B9.5IV	N D	194458.44+450750.5
19450+4508	STF2579	AC	2014	7	66	62.6	2.89	12.00	B9.5IV	N	194458.44+450750.5
19450+4508	STF2579	AC	2017	8	67	62.5	2.89	12.00	B9.5IV	N	194458.44+450750.5

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