20134+3844 BLL  47AC

Coord 2000	20134+3844		Discov num	BLL  47		Comp	AC		Coord arcsec 2000	20 13 23.66 +38 43 44.5
Date first	1878		Date last	2015		Obs	21
Pa first	106		Pa last	106		P.A. Now (θ)	106°
Sep first	156.0		Sep last	154.0		Sep. Now (ρ)	154"
Mag pri	8.00		Mag sec	9.50		delta mag (ΔM)	1.5		Spectral class	CII (red carbon star)
Pri motion ra	+009		Sec motion ra	-008
Pri motion dec	+002		Sec motion dec	+001
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.847 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	RS Cyg	69636	20134+3844	BLL 47	AB	1879	2015	24	354	131.7	8.00	7.15	0.85
Show		69636	20134+3844	BLL 47	AC	1878	2015	21	106	154.0	8.00	9.50	1.50		<===

Triple system
3 visible stars in this system

Precise pa	105.8		Precise sep	153.999		Var name	RS Cyg		Constellation	Cygnus
SAO	69636		HIP	99653		Tycho2	3151-00539-1		Gaia DR2	67887555840
HD	192443		BD	BD+38 3957		Distance	473.93		Distance ly	1545.96

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20134+3844	BLL 47	AC	2003	15	106	154.1	8.00	9.50		N D	201323.66+384344.5
20134+3844	BLL 47	AC	2012	17	106	154.1	8.00	9.50		N D	201323.66+384344.5
20134+3844	BLL 47	AC	2015	18	106	154.0	8.00	9.50	CII	N	201323.66+384344.5

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