20181+4122 ES 1674

Coord 2000	20181+4122		Discov num	ES 1674		Comp			Coord arcsec 2000	20 18 03.61 +41 22 14.8
Date first	1892		Date last	2015		Obs	13
Pa first	121		Pa last	125		P.A. Now (θ)	125°
Sep first	5.2		Sep last	4.9		Sep. Now (ρ)	4.9"
Mag pri	9.64		Mag sec	10.27		delta mag (ΔM)	0.63		Spectral class	B0 (blue-white)
Pri motion ra	-008		Sec motion ra	-001
Pri motion dec	-003		Sec motion dec	-010
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.985 This double is not physical.

Precise pa	124.9		Precise sep	4.929		Constellation	Cygnus		Tycho2	3159-01888-1
Gaia DR2	75943278976		HD	228827

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20181+4122	ES 1674		2006	9	125	4.9	9.64	10.27	B0	N D	201803.61+412214.8
20181+4122	ES 1674		2008	10	126	4.9	9.64	10.27	B0	N D	201803.61+412214.8
20181+4122	ES 1674		2010	12	124	4.7	9.64	10.27	B0	N	201803.61+412214.8
20181+4122	ES 1674		2015	13	125	4.9	9.64	10.27	B0	N	201803.61+412214.8

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