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Current system

20189+2339
POU4359

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

20189+2339 POU4359

20^h 18^m 51.99^s +23° 38' 55.3" P.A. 354.00 sep 12.9 mag 12.90,13.20

Coord 2000	20189+2339		Discov num	POU4359		Comp			Coord arcsec 2000	20 18 51.99 +23 38 55.3
Date first	1898		Date last	2016		Obs	11
Pa first	355		Pa last	354		P.A. Now (θ)	354°
Sep first	13.1		Sep last	12.9		Sep. Now (ρ)	12.9"
Mag pri	12.90		Mag sec	13.20		delta mag (ΔM)	0.3		Spectral class
Pri motion ra	-014		Sec motion ra	+003
Pri motion dec	-033		Sec motion dec	-016
Notes

rPM=0.671

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

354.4

Precise sep

12.931

Constellation

Vulpecula

Gaia DR2

1830409233561606528

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20189+2339	POU4359		2000	2	355	12.9	12.90	13.20		D	201851.99+233855.3
20189+2339	POU4359		2008	3	355	13.0	12.90	13.20		D	201851.99+233855.3
20189+2339	POU4359		2010	5	354	12.8	12.90	13.20			201851.99+233855.3
20189+2339	POU4359		2015	9	354	12.9	12.90	13.20			201851.99+233855.3

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