20331+2852 ES  507AB

Coord 2000	20331+2852		Discov num	ES  507		Comp	AB		Coord arcsec 2000	20 33 03.81 +28 51 48.0
Date first	1907		Date last	2015		Obs	11
Pa first	296		Pa last	295		P.A. Now (θ)	295°
Sep first	7.3		Sep last	7.1		Sep. Now (ρ)	7.1"
Mag pri	8.78		Mag sec	11.40		delta mag (ΔM)	2.62		Spectral class	F (yellow-white)
Pri motion ra	-005		Sec motion ra
Pri motion dec	-019		Sec motion dec
Notes

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		88827	20 33 04 +28 51 48	ES 507 AB	2015	11	295	7.1	8.78	11.40	2.62		<===
Show		88827	20 33 04 +28 51 48	ES 507 AC	2019	33	346	36.4	8.78	9.87	1.09
Show		88827	20 33 04 +28 51 48	ES 507 AD	2015	19	224	36.8	8.78	10.49	1.71
Show		88827	20 33 04 +28 51 48	FYM 137 AE	2015	8	101	42.6	8.78	14.80	6.02
Show		88827	20 33 04 +28 51 48	FYM 137 AF	2015	8	176	23.3	8.78	15.20	6.42
Show		88827	20 33 04 +28 51 48	FYM 137 AG	2015	8	299	32.9	8.78	14.80	6.02
Show		88827	20 33 02 +28 51 21	ES 507 DS	2015	10	146	16.0	10.49	12.80	2.31

Octuple system
8 visible stars in this system

Precise pa	294.5		Precise sep	7.114		Constellation	Vulpecula		SAO	88827
HIP	101407		Tycho2	2169-00932-1		Gaia DR2	1857557897947885056		HD	195894
BD	BD+28 3790		Distance	262.47		Distance ly	856.18

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20331+2852	ES 507	AB	2000	3	297	7.2	8.90	11.40	F	D	203303.81+285148.0
20331+2852	ES 507	AB	2011	4	294	7.2	8.70	11.40	F	D	203303.81+285148.0
20331+2852	ES 507	AB	2015	7	294	7.1	8.78	11.40	F		203303.81+285148.0

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