20183+2539 WAL 131AE

Coord 2000	20183+2539		Discov num	WAL 131		Comp	AE		Coord arcsec 2000	20 18 17.06 +25 38 53.7
Date first	1898		Date last	2015		Obs	22
Pa first	152		Pa last	151		P.A. Now (θ)	151°
Sep first	122.4		Sep last	122.8		Sep. Now (ρ)	122.8"
Mag pri	6.96		Mag sec	8.13		delta mag (ΔM)	1.17		Spectral class	B2V (blue-white)
Pri motion ra	+003		Sec motion ra	+006
Pri motion dec	+005		Sec motion dec	-001
Notes	N (See Notes)

rPM=1.103 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		88490	20 18 17 +25 38 54	BU 985 AB	2009	8	153	5.9	6.99	12.80	5.81
Show		88490	20 18 17 +25 38 54	HJ 1499 AC	2015	22	355	21.5	6.96	10.87	3.91
Show		88490	20 18 17 +25 38 54	WAL 131 AE	2015	22	151	122.8	6.96	8.13	1.17		<===
Show		88490	20 18 17 +25 39 15	BU 985 CD	2015	13	67	8.6	10.87	13.60	2.73

Quintuple system
5 visible stars in this system

Precise pa	151.2		Precise sep	122.826		Constellation	Vulpecula		SAO	88490
HIP	100088		Tycho2	2159-00108-1		Gaia DR2	1835372605164694144		HD	193220
BD	BD+25 4189		Distance	729.93		Distance ly	2381.03

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20183+2539	WAL 131	AE	2002	13	153	122.5	6.96	8.13	B2V	D	201817.06+253853.7
20183+2539	WAL 131	AE	2009	14	151	123.1	6.96	8.13	B2V	N D	201817.06+253853.7
20183+2539	WAL 131	AE	2012	16	151	123.1	6.96	8.13	B2V	N D	201817.06+253853.7
20183+2539	WAL 131	AE	2013	18	151	121.8	6.96	8.13	B2V	N	201817.06+253853.7
20183+2539	WAL 131	AE	2015	22	151	122.8	6.96	8.13	B2V	N	201817.06+253853.7

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