23460+4625 MCA 75 Aa,Ab

Coord 2000	23460+4625		Discov num	MCA  75		Comp	Aa,Ab		Coord arcsec 2000	23 46 02.04 +46 25 13.0
Date first	1977		Date last	2003		Obs	4
Pa first	284		Pa last	164.3		P.A. Now (θ)	164.3°
Sep first	0.3		Sep last	0.226		Sep. Now (ρ)	0.226"
Mag pri	5.21		Mag sec			delta mag (ΔM)			Spectral class	G5Ib (yellow)
Pri motion ra	+011		Sec motion ra
Pri motion dec	-009		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		53355	23 46 02 +46 25 13	MCA 75 Aa,Ab	2003	4	164	0.2	5.21				<===
Show		53355	23 46 02 +46 25 13	MCA 75 Aa,Ac	2018	44	275	0.4	5.21	8.11	2.90
Show		53355	23 46 02 +46 25 13	BU 1532 AB	2015	3	218	24.8	5.09	14.60	9.51
Show		53355	23 46 02 +46 25 13	BU 1532 AC	2015	4	16	61.9	5.09	13.10	8.01
Show	Psi And	53355	23 46 02 +46 25 13	BU 1532 AD	2015	12	152	186.9	5.09	9.46	4.37
Show		53355	23 46 02 +46 25 13	ARN 27 AE	2015	10	318	240.6	5.09	10.38	5.29

Septuple system
5 estimated visually detectable stars in this system

Constellation	Andromeda		SAO	53355		HIP	117221		Tycho2	3638-02516-1
Gaia DR2	1938979585833226112		HD	223047		HR	9003		GC	32988
BD	BD+45 4321		Bayer	Psi Andromedae		Bayer name	Psi And		Flamsteed	20 Andromedae
Flamsteed name	20 And		FK5	1622		Distance	307.69		Distance ly	1003.68
Bayer greek	ψ And

discov_num	notes	refcode
MCA 75	psi And = 20 And. R.H. Wilson reported a wide, faint companion.	WRH1950a
	H. McAlister resolved the primary into a triple system.	McA1978b
	Aac: It is not established whether this third component belongs to Aa
	or Ab.
	Based on mean motion of Aa,Ac a period of ~300 years is postulated.	Tok2010b
	Based on the separation of Aa,Ab relative to this dynamic stability
	is questioned, however Aa,Ab has only been measured four times while
	Aa,Ac has been measured 39. Is Aa,Ab of a larger delta-m and if not
	why is it so infrequently measured. Could it be spurious?

refcode	metd	author	reference
McA1978b	Sc j	McAlister, H.A.	1978ApJ...225..932M
McA1978b		ApJ 225, 932, 1978
Tok2010b	S -	Tokovinin, A.	...................
Tok2010b		private communication
WRH1950a	J j	Wilson, R.H.	1950AJ.....55..153W
WRH1950a	+Ma	AJ 55, 153, 1950
WRH1950a		(U and T coded observations per van den Bos, J Obs 34, 85, 1951)	1951JO.....34...85V

idgroup	discov	author
1	ARN	Arnold, D.
100	BU	Burnham, S.W. (BU 1 - 81)

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
23460+4625	MCA 75	Aa,Ab	2003	3	164	0.2	5.09		G5Ib	N	234602.04+462513.0

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