20087+3130 SEI 910

Coord 2000	20087+3130		Discov num	SEI 910		Comp			Coord arcsec 2000	20 08 39.17 +31 29 47.7
Date first	1893		Date last	2015		Obs	14
Pa first	122		Pa last	105		P.A. Now (θ)	105°
Sep first	10.0		Sep last	12.3		Sep. Now (ρ)	12.3"
Mag pri	11.66		Mag sec	12.15		delta mag (ΔM)	0.49		Spectral class
Pri motion ra	-003		Sec motion ra	+026
Pri motion dec	-004		Sec motion dec	+004
Notes

rPM=1.144 This double is not physical.

Precise pa	105.1		Precise sep	12.264		Constellation	Cygnus		SAO	69493
Tycho2	2671-01284-1		Gaia DR2	19300126848

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20087+3130	SEI 910		2006	7	106	12.4	11.66	12.21		D	200839.17+312947.7
20087+3130	SEI 910		2010	9	106	12.0	11.66	12.15			200839.17+312947.7
20087+3130	SEI 910		2015	10	105	12.3	11.66	12.15			200839.17+312947.7

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