20057+3536 SHJ 316AB

Coord 2000	20057+3536		Discov num	SHJ 316		Comp	AB		Coord arcsec 2000	20 05 39.80 +35 36 28.1
Date first	1876		Date last	2018		Obs	31
Pa first	324		Pa last	323		P.A. Now (θ)	323°
Sep first	69.4		Sep last	69.4		Sep. Now (ρ)	69.4"
Mag pri	7.79		Mag sec	8.82		delta mag (ΔM)	1.03		Spectral class	O7IIIe (blue)
Pri motion ra	-004		Sec motion ra	-004
Pri motion dec	-007		Sec motion dec	-007
Notes	N (See Notes)

Visually invisible, K-band or other infrared star Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69391	20057+3536	SHJ 316	AB	1876	2018	31	323	69.4	7.79	8.82	1.03		<===
Show		69391	20057+3536	ES 24	BC	1900	2018	11	241	11.3	8.82	13.80	4.98
Show		69391	20057+3536	ES 24	BD	1900	2018	14	86	17.1	8.82	13.11	4.29

Quadruple system
4 visible stars in this system

Precise pa	322.8		Precise sep	69.44		Constellation	Cygnus		SAO	69391
HIP	98976		Tycho2	2678-00109-1		Gaia DR2	35632404992		HD	190864
BD	BD+35 3949		Distance	487.8		Distance ly	1591.2

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20057+3536	SHJ 316	AB	2002	23	323	69.5	7.79	8.82	O7IIIe	D	200539.80+353628.1
20057+3536	SHJ 316	AB	2009	24	323	69.6	7.79	8.82	O7IIIe	D	200539.80+353628.1
20057+3536	SHJ 316	AB	2012	25	323	69.6	7.79	8.82	O7IIIe	N D	200539.80+353628.1
20057+3536	SHJ 316	AB	2015	26	323	69.6	7.79	8.82	O7IIIe	N	200539.80+353628.1
20057+3536	SHJ 316	AB	2018	31	323	69.4	7.79	8.82	O7IIIe	N	200539.80+353628.1

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