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20247+3523
SEI1117

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

20247+3523 SEI1117

20^h 24^m 43.52^s +35° 23' 28.9" P.A. 127.00 sep 13.1 mag 11.80,11.60

Coord 2000	20247+3523		Discov num	SEI1117		Comp			Coord arcsec 2000	20 24 43.52 +35 23 28.9
Date first	1896		Date last	2015		Obs	15
Pa first	124		Pa last	127		P.A. Now (θ)	127°
Sep first	13.9		Sep last	13.1		Sep. Now (ρ)	13.1"
Mag pri	11.80		Mag sec	11.60		delta mag (ΔM)	0.2		Spectral class
Pri motion ra	+008		Sec motion ra	+000
Pri motion dec	+003		Sec motion dec	-004
Notes

rPM=1.244

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	126.9		Precise sep	13.071		Constellation	Cygnus		Tycho2	2693-00562-1
Gaia DR2	2057196189837139840

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20247+3523	SEI1117		1999	7	126	13.1	11.80	12.15		D	202443.52+352328.9
20247+3523	SEI1117		2009	8	127	13.0	11.80	12.15		D	202443.52+352328.9
20247+3523	SEI1117		2010	10	127	13.0	11.80	11.60			202443.52+352328.9
20247+3523	SEI1117		2015	11	127	13.1	11.80	11.60			202443.52+352328.9

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