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Current system

20318+2343
POU4570

Selections

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

20318+2343 POU4570

20^h 31^m 45.86^s +23° 42' 59.5" P.A. 111.00 sep 11.6 mag 13.50,14.40

Coord 2000	20318+2343		Discov num	POU4570		Comp			Coord arcsec 2000	20 31 45.86 +23 42 59.5
Date first	1899		Date last	2015		Obs	7
Pa first	115		Pa last	111		P.A. Now (θ)	111°
Sep first	11.2		Sep last	11.6		Sep. Now (ρ)	11.6"
Mag pri	13.50		Mag sec	14.40		delta mag (ΔM)	0.9		Spectral class
Pri motion ra	-007		Sec motion ra	+000
Pri motion dec	-009		Sec motion dec	-044
Notes

rPM=0.811

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	110.9		Precise sep	11.606		Constellation	Vulpecula		SAO	88803
Gaia DR2	1831303828012297600

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20318+2343	POU4570		2000	2	111	11.6	13.50	14.40		D	203145.86+234259.5
20318+2343	POU4570		2001	3	111	11.6	13.50	14.40		D	203145.86+234259.5
20318+2343	POU4570		2010	4	111	11.5	13.50	14.40			203145.86+234259.5
20318+2343	POU4570		2015	5	111	11.6	13.50	14.40			203145.86+234259.5

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