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20343+5707
STI2541

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

20343+5707 STI2541

20^h 34^m 16.98^s +57° 07' 12.7" P.A. 205.00 sep 10.6 mag 9.71,10.60 Sp A5

Coord 2000	20343+5707		Discov num	STI2541		Comp			Coord arcsec 2000	20 34 16.98 +57 07 12.7
Date first	1899		Date last	2016		Obs	14
Pa first	205		Pa last	205		P.A. Now (θ)	205°
Sep first	10.8		Sep last	10.6		Sep. Now (ρ)	10.6"
Mag pri	9.71		Mag sec	10.60		delta mag (ΔM)	0.89		Spectral class	A5 (white)
Pri motion ra	+015		Sec motion ra	+016
Pri motion dec	+016		Sec motion dec	+015
Notes

rPM=0.064 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	204.8		Precise sep	10.623		Constellation	Cygnus		SAO	32703
Tycho2	3958-01123-1		Gaia DR2	2187191793183845504		HD	239452

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20343+5707	STI2541		2002	5	205	10.6	9.71	10.60	A5	D	203416.98+570712.7
20343+5707	STI2541		2003	6	205	10.6	9.71	10.60	A5	D	203416.98+570712.7
20343+5707	STI2541		2010	7	205	9.6	9.71	10.60	A5		203416.98+570712.7
20343+5707	STI2541		2015	8	205	10.6	9.71	10.60	A5		203416.98+570712.7

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