20173+3420 SEI1064

Coord 2000	20173+3420		Discov num	SEI1064		Comp			Coord arcsec 2000	20 17 16.15 +34 20 08.0
Date first	1893		Date last	2015		Obs	17
Pa first	253		Pa last	254		P.A. Now (θ)	254°
Sep first	23.8		Sep last	23.9		Sep. Now (ρ)	23.9"
Mag pri	10.16		Mag sec	10.67		delta mag (ΔM)	0.51		Spectral class	A0 (white)
Pri motion ra	-001		Sec motion ra	-002
Pri motion dec	-006		Sec motion dec	-004
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.368 Nature of this double is uncertain.

Precise pa	253.9		Precise sep	23.868		Constellation	Cygnus		Tycho2	2680-01487-1
Gaia DR2	45716598912		HD	228740

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20173+3420	SEI1064		2000	8	254	23.8	10.16	10.67	A0	N D	201716.15+342008.0
20173+3420	SEI1064		2010	9	254	23.7	10.16	10.67	A0	N D	201716.15+342008.0
20173+3420	SEI1064		2011	10	254	23.8	10.16	10.67	A0	N D	201716.15+342008.0
20173+3420	SEI1064		2015	13	254	23.9	10.16	10.67	A0	N	201716.15+342008.0

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