20215+3950 SEI1103

Coord 2000	20215+3950		Discov num	SEI1103		Comp			Coord arcsec 2000	20 21 32.72 +39 49 45.6
Date first	1892		Date last	2015		Obs	14
Pa first	224		Pa last	223		P.A. Now (θ)	223°
Sep first	16.9		Sep last	17.0		Sep. Now (ρ)	17"
Mag pri	9.11		Mag sec	10.85		delta mag (ΔM)	1.74		Spectral class	B2Ib (blue-white)
Pri motion ra	-003		Sec motion ra	-004
Pri motion dec	-007		Sec motion dec	-007
Notes

rPM=0.124 (< 0.3, Physical double) This double is physical.

Precise pa	223		Precise sep	17.039		Constellation	Cygnus		SAO	69895
HIP	100391		Tycho2	3156-00479-1		Gaia DR2	50151685888		HD	193946
BD	BD+39 4151		Distance	255.1		Distance ly	832.14

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20215+3950	SEI1103		1998	6	223	17.1	9.11	10.85	B2Ib	D	202132.72+394945.6
20215+3950	SEI1103		2008	7	223	16.8	9.11	10.85	B2Ib	D	202132.72+394945.6
20215+3950	SEI1103		2010	9	223	16.9	9.11	10.85	B2Ib		202132.72+394945.6
20215+3950	SEI1103		2015	10	223	17.0	9.11	10.85	B2Ib		202132.72+394945.6

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