20231+4048 GRF  15

Coord 2000	20231+4048		Discov num	GRF  15		Comp			Coord arcsec 2000	20 23 06.70 +40 48 01.7
Date first	1893		Date last	2013		Obs	7
Pa first	138		Pa last	139		P.A. Now (θ)	139°
Sep first	198.9		Sep last	199.3		Sep. Now (ρ)	199.3"
Mag pri	7.48		Mag sec	7.19		delta mag (ΔM)	0.29		Spectral class	K1III+B9I (yellow-orange/blue-white)
Pri motion ra	+029		Sec motion ra	-003
Pri motion dec	+008		Sec motion dec	-006
Notes	V U (Proper motion indicates physical, Proper motion indicates non-physical)

Visually invisible, K-band or other infrared star rPM=1.161 This double is not physical.

Precise pa	139.4		Precise sep	199.26		Constellation	Cygnus		SAO	49556
Tycho2	3156-02039-1		Gaia DR2	63079073280		HD	194241

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20231+4048	GRF 15		2000	1	138	198.0	7.40	7.10	K1III+B9I	V	202306.70+404801.7
20231+4048	GRF 15		2013	5	139	199.3	7.48	7.19	K1III+B9I	VU	202306.70+404801.7

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