20123+4505 ES 1268

Coord 2000	20123+4505		Discov num	ES 1268		Comp			Coord arcsec 2000	20 12 16.26 +45 05 18.8
Date first	1892		Date last	2015		Obs	10
Pa first	156		Pa last	150		P.A. Now (θ)	150°
Sep first	8.1		Sep last	8.2		Sep. Now (ρ)	8.2"
Mag pri	9.47		Mag sec	11.70		delta mag (ΔM)	2.23		Spectral class	B9 (blue-white)
Pri motion ra	+002		Sec motion ra	+009
Pri motion dec	+000		Sec motion dec	+000
Notes

rPM=0.778 Nature of this double is uncertain.

Precise pa	150.1		Precise sep	8.192		Constellation	Cygnus		SAO	49315
Tycho2	3559-02304-1		Gaia DR2	80722071168		HD	192278

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20123+4505	ES 1268		1998	4	151	8.1	9.47	11.70	B9	D	201216.26+450518.8
20123+4505	ES 1268		2003	5	151	8.2	9.47	11.70	B9	D	201216.26+450518.8
20123+4505	ES 1268		2010	6	152	8.0	9.47	11.70	B9		201216.26+450518.8
20123+4505	ES 1268		2015	10	150	8.2	9.47	11.70	B9		201216.26+450518.8

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