20136+4644 HJ 1495AB (31 Cyg)

Coord 2000	20136+4644		Discov num	HJ 1495		Comp	AB		Coord arcsec 2000	20 13 37.90 +46 44 28.8
Date first	1828		Date last	2015		Obs	12
Pa first	333		Pa last	328		P.A. Now (θ)	328°
Sep first	29.0		Sep last	36.5		Sep. Now (ρ)	36.5"
Mag pri	3.93		Mag sec	13.40		delta mag (ΔM)	9.47		Spectral class	K2II (yellow-orange)
Pri motion ra	+005		Sec motion ra	-010
Pri motion dec	+001		Sec motion dec	-006
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.419 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		49337	20136+4644	WRH 33	Aa,Ab	1949	1985	6	144	0.0	3.93			Y
Show	31 Cyg	49337	20136+4644	HJ 1495	AB	1828	2015	12	328	36.5	3.93	13.40	9.47		<===
Show		49337	20136+4644	STFA 50	AC	1779	2016	46	173	108.6	3.93	6.97	3.04
Show		49337	20136+4644	STFA 50	AD	1800	2016	38	322	336.7	3.93	4.83	0.90
Show		49337	20136+4644	BU 1483	AF	1878	2015	4	168	43.5	3.93	13.90	9.97
Show		49338	20136+4644	BU 1483	CG	1878	2003	3	95	37.9	6.97	14.20	7.23
Show		49338	20136+4644	BU 1483	CH	1878	2014	4	62	60.6	6.97	12.60	5.63
Show		49338	20136+4644	BU 1483	CI	1878	2015	7	136	60.2	6.97	12.26	5.29
Show		49332	20136+4644	GUI 30	DC	1800	2003	27	150	431.8	4.83	6.97	2.14
Show		49332	20136+4644	ES 26	DE	1900	2003	4	252	36.3	4.83	13.20	8.37
Show		49337	20136+4644	SMR 68	FJ	2003	2015	3	217	4.2	13.90	15.10	1.20
Show		49338	20136+4644	SMR 68	HK	2000	2015	8	262	8.9	11.74	10.87	0.87

12-fold system
11 visible stars in this system

Precise pa	327.6		Precise sep	36.46		Name	31 Cyg		Constellation	Cygnus
SAO	49337		HIP	99675		Tycho2	3559-02797-1		Gaia DR2	52678091904
HD	192577		HR	7735		GC	28099		BD	BD+46 2882
Flamsteed	31 Cygni		Flamsteed name	31 Cyg		Distance	271		Distance ly	884

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20136+4644	HJ 1495	AB	2007	6	327	36.0	3.93	13.40	K2II	D	201337.90+464428.8
20136+4644	HJ 1495	AB	2012	9	330	36.3	3.93	13.40	K2II	N D	201337.90+464428.8
20136+4644	HJ 1495	AB	2014	10	328	36.1	3.93	13.40	K2II	N D	201337.90+464428.8
20136+4644	HJ 1495	AB	2015	11	328	36.5	3.93	13.40	K2II	N	201337.90+464428.8

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