20327+3711 SEI1158AB

Coord 2000	20327+3711		Discov num	SEI1158		Comp	AB		Coord arcsec 2000	20 32 42.32 +37 10 45.5
Date first	1896		Date last	2015		Obs	10
Pa first	103		Pa last	109		P.A. Now (θ)	109°
Sep first	22.9		Sep last	20.9		Sep. Now (ρ)	20.9"
Mag pri	10.10		Mag sec	11.50		delta mag (ΔM)	1.4		Spectral class
Pri motion ra	+005		Sec motion ra	-018
Pri motion dec	-008		Sec motion dec	-020
Notes

rPM=0.964 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 32 42 +37 10 46	SEI 1158 AB	2015	10	109	20.9	10.10	11.50	1.40		<===
Show			20 32 42 +37 10 46	TDT 2352 Aa,Ab	1991	1	160	0.4	10.60	10.62	0.02

Triple system
2 visible stars in this system

Precise pa	109.1		Precise sep	20.923		Constellation	Cygnus		Tycho2	2697-00947-1
Gaia DR2	2063021677314514304

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20327+3711	SEI1158	AB	1998	5	108	21.2	10.10	11.50		D	203242.32+371045.5
20327+3711	SEI1158	AB	2002	6	108	21.4	10.10	11.50		D	203242.32+371045.5
20327+3711	SEI1158	AB	2015	7	109	20.9	10.10	11.50			203242.32+371045.5

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