18437-2240 DON 919 AB

18^h 43^m 42.74^s -22° 40' 13.0" P.A. 80.00 sep 3.4 mag 8.10,12.70 Sp F7V dist. 74.85 pc (244.16 l.y.)

Coord 2000	18437-2240		Discov num	DON 919		Comp	AB		Coord arcsec 2000	18 43 42.74 -22 40 13.0
Date first	1928		Date last	2016		Obs	5
Pa first	71		Pa last	80		P.A. Now (θ)	80°
Sep first	3.5		Sep last	3.376		Sep. Now (ρ)	3.376"
Mag pri	8.10		Mag sec	12.70		delta mag (ΔM)	4.6		Spectral class	F7V (yellow-white)
Pri motion ra	-034		Sec motion ra
Pri motion dec	-071		Sec motion dec
Notes

Nature of this double is uncertain.

18437-2240 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		187196	18 43 43 -22 40 13	DON 919 AB	2016	5	80	3.4	8.10	12.70	4.60		<===
Show		187196	18 43 43 -22 40 13	DON 919 AC	2015	8	306	14.9	8.10	12.60	4.50

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Sagittarius		SAO	187196		HIP	91864		Tycho2	6859-00235-1
Gaia DR2	4078516651023103360		HD	172934		BD	BD-22 4837		CD	CD-2213240
Distance	74.85		Distance ly	244.16