20584+1050 MUG 16 AE

Coord 2000	20584+1050		Discov num	MUG  16		Comp	AE		Coord arcsec 2000	20 58 25.93 +10 50 21.4
Date first	2000		Date last	2016		Obs	7
Pa first	194		Pa last	193.7		P.A. Now (θ)	193.7°
Sep first	29.2		Sep last	29.23		Sep. Now (ρ)	29.23"
Mag pri	5.61		Mag sec	16.60		delta mag (ΔM)	10.99		Spectral class	G6III+M4- (yellow/red)
Pri motion ra	-049		Sec motion ra
Pri motion dec	-034		Sec motion dec
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Musica	106712	20 58 26 +10 50 21	ENG 78 AB	2003	19	162	197.5	5.61	9.88	4.27
Show		106712	20 58 26 +10 50 21	BUP 220 AC	2015	5	338	129.3	5.61	12.77	7.16
Show		106712	20 58 26 +10 50 21	MUG 16 AE	2016	7	194	29.2	5.61	16.60	10.99		<===
Show			20 58 30 +10 47 16	BUP 220 BC	2015	7	339	326.5	9.88	12.77	2.89
Show			20 58 30 +10 47 16	BUP 220 BD	2018	11	224	67.4	9.88	12.01	2.13

Quintuple system
5 estimated visually detectable stars in this system

Common name	Musica		Constellation	Delphinus		SAO	106712		HIP	103527
Tycho2	1107-02709-1		Gaia DR2	1756741374681702784		HD	199665		HR	8030
GC	29266		BD	BD+10 4425		Flamsteed	18 Delphini		Flamsteed name	18 Del
Distance	75.3		Distance ly	245.63

Meaning

Dominican Republic proposal; the god of drought and protector of the Sun.

discov_num	notes	refcode
ENG 78	A is 18 Del = Musica, B is BD+10@4426. BD measures from Burnham,	Bu_1913
	WFC, Sturdy, and 2MASS were earlier	WFC1998
	erroneously labelled as being of the	Stu1994
	BC pair	TMA2003
	CHARA Array Limb-darkened diameter 1.111 +/- 0.028 mas.	CIA2009a
	R = 9.00 +/- 0.31 \rsun, L = 47.6 +/- 1.8 \lsun,
	Teff = 5054 +/- 81 K.
MUG 16	AE: Spectral type of comoving E comp estimated M4-5, mass 0.19 Msun.	Mug2014

refcode	metd	author	reference
Bu_1913	Ma j	Burnham, S.W.	1913QB811.B8.......
Bu_1913	+Pa	Carnegie Inst. Wash. #168, 1913
Bu_1913	+T
CIA2009a	not j	Baines, E.K., McAlister, H.A., ten Brummelaar, T.A., Sturmann, J., Sturmann, L.,	2009ApJ...701..154B
CIA2009a		Turner, N.H. & Ridgway, S.T.	.
CIA2009a		ApJ 701, 154, 2009	.
Mug2014	A j	Mugrauer, M., Ginski, C., & Seeliger, M.	2014MNRAS.439.1063M
Mug2014	+Ci	MNRAS 439, 1063, 2014
Mug2014	+E+
Stu1994	Mb -	Sturdy, K.	...................
Stu1994		Webb Soc., Double Star Circ. 6, 1994
TMA2003	E2 j	2MASS Catalog	.
TMA2003		2MASS Point Src Cat., 2003 all-sky release (http://pegasus.phast.umass.edu/)
TMA2003		(Note: 2MASS photometry also added by cataloguer to 2MASS astrometry published
TMA2003		under other references.)
TMA2003		Thurgood Marshall High School
WFC1998	Pa j	Urban, S.E., Corbin, T.E., Wycoff, G.L., Martin, J.C., Jackson, E.S.,	1998AJ....115.1212U
WFC1998		Zacharias, M.I., & Hall, D.M.
WFC1998		AJ 115, 1212, 1998 (Astrographic Cat. 2000)

idgroup	discov	author
1	BUP	Burnham proper motion stars (see Burnham, Carnegie Inst. Wash. #168, 1913)
1	ENG	changed from EN to ENG and that for Engelhardt from ENG to ENH. This has led to

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20584+1050	MUG 16	AE	2011	4	194	29.2	5.61	16.60	G6III M4-	NV	205825.93+105021.4
20584+1050	MUG 16	AE	2015	5	194	29.2	5.61	16.60	G6III+M4-	NV	205825.93+105021.4
20584+1050	MUG 16	AE	2016	7	194	29.2	5.61	16.60	G6III+M4-	NV	205825.93+105021.4

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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

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