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Current system

20183+3802
SLE 993

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20183+3802 SLE 993

20^h 18^m 16.55^s +38° 02' 28.5" P.A. 70.00 sep 16.4 mag 11.50,14.05

Coord 2000	20183+3802		Discov num	SLE 993		Comp			Coord arcsec 2000	20 18 16.55 +38 02 28.5
Date first	1985		Date last	2015		Obs	9
Pa first	70		Pa last	70		P.A. Now (θ)	70°
Sep first	16.2		Sep last	16.4		Sep. Now (ρ)	16.4"
Mag pri	11.50		Mag sec	14.05		delta mag (ΔM)	2.55		Spectral class
Pri motion ra	-004		Sec motion ra	-002
Pri motion dec	-001		Sec motion dec	-007
Notes

rPM=0.869

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

70

Precise sep

16.43

Constellation

Cygnus

Gaia DR2

2061055922330606080

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20183+3802	SLE 993		1998	2	70	16.5	11.50	12.20		D	201816.50+380219.6
20183+3802	SLE 993		2002	3	70	16.5	11.50	14.05			201816.55+380228.5
20183+3802	SLE 993		2010	4	69	15.2	11.50	14.05			201816.55+380228.5
20183+3802	SLE 993		2015	5	70	16.4	11.50	14.05			201816.55+380228.5

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