20257+2521 STF2682

Coord 2000	20257+2521		Discov num	STF2682		Comp			Coord arcsec 2000	20 25 40.97 +25 21 02.2
Date first	1892		Date last	2015		Obs	24
Pa first	302		Pa last	298		P.A. Now (θ)	298°
Sep first	20.3		Sep last	22.0		Sep. Now (ρ)	22"
Mag pri	8.34		Mag sec	10.17		delta mag (ΔM)	1.83		Spectral class	A2 (white)
Pri motion ra	+024		Sec motion ra	+005
Pri motion dec	+008		Sec motion dec	+006
Notes

rPM=0.755 Nature of this double is uncertain.

Precise pa	297.6		Precise sep	21.978		Constellation	Vulpecula		SAO	88666
Tycho2	2160-00416-1		Gaia DR2	78769869184		HD	194596

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20257+2521	STF2682		2006	15	290	21.4	8.34	10.17	A2	D	202540.97+252102.2
20257+2521	STF2682		2008	16	297	22.0	8.34	10.17	A2	D	202540.97+252102.2
20257+2521	STF2682		2010	19	298	21.9	8.34	10.17	A2		202540.97+252102.2
20257+2521	STF2682		2015	20	298	21.9	8.34	10.17	A2		202540.97+252102.2

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