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Doubles in session

Current system

20189+3839
SLE 996

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

20189+3839 SLE 996

20^h 18^m 52.41^s +38° 39' 09.6" P.A. 106.00 sep 6.6 mag 11.94,12.60

Coord 2000	20189+3839		Discov num	SLE 996		Comp			Coord arcsec 2000	20 18 52.41 +38 39 09.6
Date first	2000		Date last	2015		Obs	8
Pa first	106		Pa last	106		P.A. Now (θ)	106°
Sep first	6.6		Sep last	6.6		Sep. Now (ρ)	6.6"
Mag pri	11.94		Mag sec	12.60		delta mag (ΔM)	0.66		Spectral class
Pri motion ra	+023		Sec motion ra	+028
Pri motion dec	+013		Sec motion dec	+001
Notes

rPM=0.464

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

105.9

Precise sep

6.581

Constellation

Cygnus

Gaia DR2

2061296646669728256

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20189+3839	SLE 996		2000	2	106	6.6	11.50	12.00		D	201852.26+383914.3
20189+3839	SLE 996		2002	2	106	6.6	11.94	12.60		D	201852.41+383909.6
20189+3839	SLE 996		2010	3	106	6.3	11.94	12.60			201852.41+383909.6
20189+3839	SLE 996		2015	4	106	6.6	11.94	12.60			201852.41+383909.6

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