19517+3108 STT 389AC

Coord 2000	19517+3108		Discov num	STT 389		Comp	AC		Coord arcsec 2000	19 51 41.33 +31 08 16.1
Date first	1849		Date last	2018		Obs	26
Pa first	183		Pa last	182		P.A. Now (θ)	182°
Sep first	12.6		Sep last	13.3		Sep. Now (ρ)	13.3"
Mag pri	7.12		Mag sec	9.53		delta mag (ΔM)	2.41		Spectral class	F0IV (yellow-white)
Pri motion ra	-002		Sec motion ra	-002
Pri motion dec	-006		Sec motion dec	+001
Notes	N Y (See Notes, Parallax indicates components are non-physical)

rPM=1.107 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		68974	19 51 41 +31 08 16	ES 357 AB	2011	7	309	10.1	7.12	12.40	5.28
Show		68974	19 51 41 +31 08 16	STT 389 AC	2018	26	182	13.3	7.12	9.53	2.41		<===

Triple system
3 visible stars in this system

Precise pa	182.2		Precise sep	13.3		Constellation	Hydra		SAO	68974
HIP	97733		Tycho2	2669-04293-1		Gaia DR2	2033506318513307264		HD	187981
Distance	215.98		Distance ly	704.53

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19517+3108	STT 389	AC	1991	20	183	12.6	7.12	9.53	F0IV	YD	195141.33+310816.1
19517+3108	STT 389	AC	2010	25	182	12.6	7.12	9.53	F0IV	NYD	195141.33+310816.1
19517+3108	STT 389	AC	2018	26	182	13.3	7.12	9.53	F0IV	NY	195141.33+310816.1

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