20331+2852 ES  507AD

Coord 2000	20331+2852		Discov num	ES  507		Comp	AD		Coord arcsec 2000	20 33 03.81 +28 51 48.0
Date first	1892		Date last	2015		Obs	19
Pa first	224		Pa last	224		P.A. Now (θ)	224°
Sep first	38.0		Sep last	36.8		Sep. Now (ρ)	36.8"
Mag pri	8.78		Mag sec	10.49		delta mag (ΔM)	1.71		Spectral class	F (yellow-white)
Pri motion ra	-005		Sec motion ra	-005
Pri motion dec	-019		Sec motion dec	-012
Notes	Y (Parallax indicates components are non-physical)

Visually invisible, K-band or other infrared star rPM=0.356 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		88827	20331+2852	ES 507	AB	1907	2015	11	295	7.1	8.78	11.40	2.62
Show		88827	20331+2852	ES 507	AC	1892	2019	33	346	36.4	8.78	9.87	1.09
Show		88827	20331+2852	ES 507	AD	1892	2015	19	224	36.8	8.78	10.49	1.71		<===
Show		88827	20331+2852	FYM 137	AE	2000	2015	8	101	42.6	8.78	14.80	6.02
Show		88827	20331+2852	FYM 137	AF	2000	2015	8	176	23.3	8.78	15.20	6.42
Show		88827	20331+2852	FYM 137	AG	2000	2015	8	299	32.9	8.78	14.80	6.02
Show		88827	20331+2852	ES 507	DS	1926	2015	10	146	16.0	10.49	12.80	2.31

Octuple system
8 visible stars in this system

Precise pa	223.9		Precise sep	36.818		Constellation	Vulpecula		SAO	88827
HIP	101407		Tycho2	2169-00932-1		Gaia DR2	97947885056		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	AD	2004	11	224	36.5	8.78	10.49		YD	203303.81+285148.0
20331+2852	ES 507	AD	2011	12	224	36.9	8.78	10.49		YD	203303.81+285148.0
20331+2852	ES 507	AD	2012	14	223	36.8	8.78	10.49		YD	203303.81+285148.0
20331+2852	ES 507	AD	2015	15	224	36.8	8.78	10.49	F	Y	203303.81+285148.0

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