20178+1520 CHE 281

Coord 2000	20178+1520		Discov num	CHE 281		Comp			Coord arcsec 2000	20 17 46.51 +15 19 35.0
Date first	1910		Date last	2016		Obs	16
Pa first	308		Pa last	316		P.A. Now (θ)	316°
Sep first	17.3		Sep last	17.7		Sep. Now (ρ)	17.7"
Mag pri	11.20		Mag sec	12.60		delta mag (ΔM)	1.4		Spectral class	A5+A8 (white/white)
Pri motion ra	+003		Sec motion ra	+009
Pri motion dec	-001		Sec motion dec	+014
Notes

rPM=0.971 This double is not physical.

Precise pa	316.2		Precise sep	17.671		Constellation	Delphinus		SAO	105936
Tycho2	1631-00541-1		Gaia DR2	60560343936		HD	355392

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20178+1520	CHE 281		2006	4	315	17.6	8.89	10.18		D	201746.51+151935.0
20178+1520	CHE 281		2008	5	315	17.5	8.89	10.18		D	201746.51+151935.0
20178+1520	CHE 281		2013	8	317	17.4	8.89	10.18			201746.51+151935.0
20178+1520	CHE 281		2016	11	316	17.7	11.20	12.60	A5+A8		201746.51+151935.0

If you need more information about this double, apply for a data request form to the WDS.