19221-2931 SHY 753 AB (HD 181544)

Coord 2000	19221-2931		Discov num	SHY 753		Comp	AB		Coord arcsec 2000	19 22 03.77 -29 31 23.2
Date first	1898		Date last	1999		Obs	14
Pa first	228		Pa last	227.2		P.A. Now (θ)	227.2°
Sep first	435.6		Sep last	435.719		Sep. Now (ρ)	435.719"
Mag pri	7.16		Mag sec	7.16		delta mag (ΔM)	0		Spectral class	G0IV+G0IV (yellow/yellow)
Pri motion ra	+139		Sec motion ra	+124
Pri motion dec	+008		Sec motion dec	-010
Notes	N V (See Notes, Proper motion indicates physical)

rPM=0.168 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		188025	19 22 04 -29 31 23	TOK 423 Aa,Ab	2016	3	36	0.8	7.20	13.00	5.80
Show	HD 181544	188025	19 22 04 -29 31 23	SHY 753 AB	1999	14	227	435.7	7.16	7.16	0.00		<===

Triple system
2 estimated visually detectable stars in this system

Name	HD 181544		Constellation	Sagittarius		SAO	188025		HIP	95203
Tycho2	6887-00845-1		Gaia DR2	6758629978021178112		HD	181544		GC	26699
CD	CD-2916041		CP	CP-29 6008		Distance	50.97		Distance ly	166.26

discov_num	notes	refcode
SHY 753	HIP 95203 + HIP 95164.
	AB + TOK 423Aa,Ab: HIP 95203 is another acceleration binary with
	variable RV resolved here. The relatively large separation of 0".77
	corresponds to a period of ~180yr. The actual period can be as short
	as 60yr if the pair is seen now near its maximum separation (it would
	then have been closer at the time of the Hipparcos mission). Most
	likely, however, the faint visual companion found here and the
	spectroscopic/acceleration pair make a triple system. There is another
	companion HIP 95164 at 435". The status of this wide pair (is it a
	real binary or just two members of a moving group?) is not clear, but
	the association of those stars leaves no doubt (common RV, PM, and
	parallax).	Tok2015c

refcode	metd	author	reference
Tok2015c	orb+j	Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P.	2015AJ....150...50T
Tok2015c	+St	AJ 150, 50, 2015 (some measures corrected in Tok2017b)	2017AJ....154..110T

idgroup	discov	author
1	SHY	Shaya, E.J. & Olling, R.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19221-2931	SHY 753	AB	1999	14	227	435.7	7.16	7.16	G0IV+G0IV	NV	192203.77-293123.2

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS