20339+3515 BU 1490AC

Coord 2000	20339+3515		Discov num	BU 1490		Comp	AC		Coord arcsec 2000	20 33 54.19 +35 15 03.1
Date first	1880		Date last	2013		Obs	12
Pa first	190		Pa last	210		P.A. Now (θ)	210°
Sep first	117.6		Sep last	115.1		Sep. Now (ρ)	115.1"
Mag pri	4.82		Mag sec	11.87		delta mag (ΔM)	7.05		Spectral class	K2Ib+B3V (yellow-orange/blue-white)
Pri motion ra	+002		Sec motion ra	-022
Pri motion dec	-005		Sec motion dec	-035
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.929 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	47 Cyg	70203	20339+3515	WRH 34	AB	1949	1998	27	278	0.3	4.84	7.30	2.46
Show		70203	20339+3515	BU 1490	AC	1880	2013	12	210	115.1	4.82	11.87	7.05		<===

Triple system
3 visible stars in this system

Precise pa	210.2		Precise sep	115.1		Constellation	Cygnus		SAO	70203
HIP	101474		Tycho2	2694-02168-1		Gaia DR2	31818264064		HD	196093
HR	7866		GC	28630		BD	BD+34 4079		Flamsteed	47 Cygni
Flamsteed name	47 Cyg		Distance	847.46		Distance ly	2764.41

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20339+3515	BU 1490	AC	1999	10	210	115.9	4.82	11.87		D	203354.19+351503.1
20339+3515	BU 1490	AC	2002	11	210	115.1	4.82	11.87		N D	203354.19+351503.1
20339+3515	BU 1490	AC	2013	12	210	115.1	4.82	11.87	K2Ib+B3V	N	203354.19+351503.1

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