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20317+2359
POU4567

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

20317+2359 POU4567

20^h 31^m 41.59^s +23° 59' 00.1" P.A. 342.00 sep 17.0 mag 13.80,13.80

Coord 2000	20317+2359		Discov num	POU4567		Comp			Coord arcsec 2000	20 31 41.59 +23 59 00.1
Date first	1898		Date last	2015		Obs	10
Pa first	340		Pa last	342		P.A. Now (θ)	342°
Sep first	17.2		Sep last	17.0		Sep. Now (ρ)	17"
Mag pri	13.80		Mag sec	13.80		delta mag (ΔM)	0		Spectral class
Pri motion ra	+028		Sec motion ra	-001
Pri motion dec	+006		Sec motion dec	+006
Notes

rPM=1.013

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	341.5		Precise sep	17.02		Constellation	Vulpecula		Tycho2	2157-01151-1
Gaia DR2	1831358524415927680

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20317+2359	POU4567		1999	2	341	17.1	13.80	13.80		D	203141.59+235900.1
20317+2359	POU4567		2008	3	341	17.1	13.80	13.80		D	203141.59+235900.1
20317+2359	POU4567		2010	5	341	17.0	13.80	13.80			203141.59+235900.1
20317+2359	POU4567		2015	6	342	17.0	13.80	13.80			203141.59+235900.1

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