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Doubles in session

Current system

13239+5456
STF 1744 AB
Mizar

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

13239+5456 STF 1744 AB (Mizar)

13^h 23^m 55.42^s +54° 55' 31.5" P.A. 154.00 sep 14.7 mag 2.23,3.88 Sp A1VpSrSi dist. 26.31 pc (85.82 l.y.)

Coord 2000	13239+5456		Discov num	STF1744		Comp	AB		Coord arcsec 2000	13 23 55.42 +54 55 31.5
Date first	1755		Date last	2020		Obs	500
Pa first	143		Pa last	153.8		P.A. Now (θ)	153.8°
Sep first	13.9		Sep last	14.744		Sep. Now (ρ)	14.744"
Mag pri	2.23		Mag sec	3.88		delta mag (ΔM)	1.65		Spectral class	A1VpSrSi (white)
Pri motion ra	+121		Sec motion ra	+121
Pri motion dec	-022		Sec motion dec	-022
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

13239+5456 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		28737	13 23 55 +54 55 32	PEA 1 Aa,Ab	2004	63	34	0.0	3.00	3.00	0.00	Y
Show	Mizar	28737	13 23 55 +54 55 32	STF 1744 AB	2020	500	154	14.7	2.23	3.88	1.65		<===
Show		28737	13 23 55 +54 55 32	STF 1744 AC	2020	15	73	715.5	2.23	4.01	1.78
Show		28737	13 23 55 +54 55 32	SMR 4 AD	2020	11	103	498.1	2.23	7.62	5.39
Show		28737	13 23 55 +54 55 32	SHY 247 AE	1999	3	321	999.9	2.23	6.88	4.65
Show		28737	13 23 55 +54 55 32	SHY 247 AF	1999	3	359	999.9	2.23	9.86	7.63
Show	Alcor	28751	13 25 14 +54 59 17	PSF 1 Ca,Cb	2009	5	207	1.0	4.01	8.00	3.99
Show	Alcor	28751	13 25 14 +54 59 17	SHY 248 CE	1999	3	317	999.9	4.01	6.88	2.87
Show	Alcor	28751	13 25 14 +54 59 17	SHY 248 CF	1999	3	355	999.9	4.01	9.86	5.85
Show	Alcor	28751	13 25 14 +54 59 17	SHY 248 CG	1999	3	271	999.9	4.01	8.21	4.20
Show	Alcor	28751	13 25 14 +54 59 17	SHY 248 CH	1999	3	243	999.9	4.01	8.63	4.62

Decuple system
8 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Mizar		Var name	NSV6224 UMa		Constellation	Ursa Major		SAO	28737
HIP	65378		Tycho2	3850-01385-1		Gaia DR2	1563590579345330944		HD	116656
HR	5054		GC	18133		ADS	8891		GL	NN 3783A
BD	BD+55 1598		Bayer	Zeta Ursae Majoris		Bayer name	Zet UMa		Flamsteed	79 Ursae Majoris
Flamsteed name	79 UMa		FK5	497		Distance	26.31		Distance ly	85.82
Bayer greek	ζ UMa

Other names

Mizat, Mirza, Mitsar

Meaning

bandage (thong)