20231+4047 J 787 AC

Coord 2000	20231+4047		Discov num	J   787		Comp	AC		Coord arcsec 2000	20 23 07.30 +40 46 55.2
Date first	1917		Date last	2015		Obs	5
Pa first	107		Pa last	111.7		P.A. Now (θ)	111.7°
Sep first	9.0		Sep last	9.508		Sep. Now (ρ)	9.508"
Mag pri	10.50		Mag sec	13.00		delta mag (ΔM)	2.5		Spectral class	B3 (blue-white)
Pri motion ra	-006		Sec motion ra	+008
Pri motion dec	-002		Sec motion dec	-011
Notes	N (See Notes)

rPM=1.224 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 23 07 +40 46 55	J 787 AB	2003	4	165	2.6	10.50	11.40	0.90
Show			20 23 07 +40 46 55	J 787 AC	2015	5	112	9.5	10.50	13.00	2.50		<===
Show			20 23 07 +40 46 55	J 787 AD	2015	5	293	15.8	10.50	12.40	1.90
Show			20 23 08 +40 46 52	J 787 CD	2015	9	292	25.3	13.00	12.40	0.60

Quadruple system
4 estimated visually detectable stars in this system

Constellation

Cygnus

Gaia DR2

2067570459999953024

discov_num	notes	refcode
J 787	CD. This pair was previously known as BU 1487CD, however Burnham	Bu_1913
	actually measured STTA207CD at 20229+4259.

refcode	metd	author	reference
Bu_1913	Ma j	Burnham, S.W.	1913QB811.B8.......
Bu_1913	+Pa	Carnegie Inst. Wash. #168, 1913
Bu_1913	+T

idgroup	discov	author
1	J	Jonckheere, R.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20231+4047	J 787	AC	2003	3	112	9.5	9.40	12.50		N D	202307.30+404655.2
20231+4047	J 787	AC	2015	5	112	9.5	10.50	13.00	B3	N	202307.30+404655.2

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS