20181+3315 SEI1072

Coord 2000	20181+3315		Discov num	SEI1072		Comp			Coord arcsec 2000	20 18 08.66 +33 15 05.4
Date first	1893		Date last	2015		Obs	16
Pa first	327		Pa last	328		P.A. Now (θ)	328°
Sep first	18.1		Sep last	17.7		Sep. Now (ρ)	17.7"
Mag pri	10.11		Mag sec	11.53		delta mag (ΔM)	1.42		Spectral class	A5 (white)
Pri motion ra	+006		Sec motion ra	+008
Pri motion dec	+008		Sec motion dec	+008
Notes

rPM=0.177 (< 0.3, Physical double) This double is physical.

Precise pa	328.3		Precise sep	17.673		Constellation	Cygnus		SAO	69778
Tycho2	2676-00565-1		Gaia DR2	99738351872		HD	228805

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20181+3315	SEI1072		1999	9	328	17.7	10.11	11.54	A5	D	201808.66+331505.4
20181+3315	SEI1072		2002	10	328	17.7	10.11	11.54	A5	D	201808.66+331505.4
20181+3315	SEI1072		2010	11	328	17.6	10.11	11.53	A5		201808.66+331505.4
20181+3315	SEI1072		2015	12	328	17.7	10.11	11.53	A5		201808.66+331505.4

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