19431-0818 STFA 45AB

Coord 2000	19431-0818		Discov num	STFA 45		Comp	AB		Coord arcsec 2000	19 43 03.26 -08 18 26.2
Date first	1823		Date last	2018		Obs	43
Pa first	147		Pa last	145		P.A. Now (θ)	145°
Sep first	97.1		Sep last	96.3		Sep. Now (ρ)	96.3"
Mag pri	7.11		Mag sec	7.56		delta mag (ΔM)	0.45		Spectral class	F4V+F5V (yellow-white/yellow-white)
Pri motion ra	+026		Sec motion ra	+017
Pri motion dec	-056		Sec motion dec	-057
Notes	N V (See Notes, Proper motion indicates physical)

Visually invisible, K-band or other infrared star rPM=0.147 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			19431-0818	STFA 45	AB	1823	2018	43	145	96.3	7.11	7.56	0.45		<===
Show			19431-0818	HDS2799	Ba,Bb	1991	2017	3	227	0.5	7.69	10.60	2.91

Triple system
2 visible stars in this system

Precise pa	145.4		Precise sep	96.268		Constellation	Aquila		HIP	97016
Tycho2	5724-02578-1		Gaia DR2	49747165568		HD	186158		BD	BD-08 5078
Distance	72.2		Distance ly	235.52

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19431-0818	STFA 45	AB	2001	35	147	97.5	7.11	7.56	F4V F5V	N D	194303.26-081826.2
19431-0818	STFA 45	AB	2011	37	147	97.8	7.11	7.56	F4V F5V	NVD	194303.26-081826.2
19431-0818	STFA 45	AB	2018	39	146	97.0	7.11	7.56	F4V+F5V	NV	194303.26-081826.2

If you need more information about this double, apply for a data request form to the WDS.