11551+4629 STF 1579 AB,C (65 UMa)

11^h 55^m 05.74^s +46° 28' 36.6" P.A. 44.00 sep 3.7 mag 6.68,8.32 Sp A3Vn dist. 211.86 pc (691.09 l.y.)

Coord 2000	11551+4629	Discov num	STF1579	Comp	AB,C	Coord arcsec 2000	11 55 05.74 +46 28 36.6
Date first	1782	Date last	2021	Obs	87
Pa first	36	Pa last	43.7	P.A. Now (θ)	43.7°
Sep first	4.0	Sep last	3.72	Sep. Now (ρ)	3.72"
Mag pri	6.68	Mag sec	8.32	delta mag (ΔM)	1.64	Spectral class	A3Vn (white)
Pri motion ra	+010	Sec motion ra	+010
Pri motion dec	+003	Sec motion dec	+003
Notes	N U (See Notes, Proper motion indicates non-physical)

This double is not physical.

11551+4629 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		43945	11 55 06 +46 28 37	A 1777 AB	2019	39	358	0.3	6.50	9.00	2.50	Y
Show	65 UMa	43945	11 55 06 +46 28 37	STF 1579 AB,C	2021	87	44	3.7	6.68	8.32	1.64		<===
Show		43945	11 55 06 +46 28 37	STF 1579 AB,D	2021	73	114	62.9	6.68	6.97	0.29
Show		43946	11 55 06 +46 28 40	STF 1579 CD	2018	14	117	61.9	8.32	6.97	1.35
Show		43946	11 55 11 +46 28 11	BAG 46 Da,Db	2018	4	326	0.1	7.10	9.20	2.10

Quintuple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	65 UMa	Var name	DN UMa	Constellation	Ursa Major	SAO	43945
HIP	58112	Tycho2	3452-02143-2	Gaia DR2	774274752546451840	HD	103483
HR	4560	GC	16296	ADS	8347	BD	BD+47 1913
Flamsteed	65 Ursae Majoris	Flamsteed name	65 UMa	Distance	211.86	Distance ly	691.09

WDS 11551+4629 STF 1579 AB,C (65 UMa) : NOTES

discov_num	notes	refcode
A 1777	65 UMa. The primary is the eclipsing binary DN UMa,
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	Discrepant 1995.3159 speckle measure found not due to a typographical	Hrt1997
	error in theta, following reexamination of original data by authors.
	Presumably there was an identification error while pointing telescope,
	although no probable match to known close pairs in the vicinity has
	been found.
65 UMa	After subtracting out the effects of the 118y AB pair, Zasche et al.
	(2012) find a 640d variation, which they attribute to a closer Aa,Ab
	pair. The 1.7d eclipsing pair DN UMa, then, is assumed to be Aa1,Aa2.
	Their analysis determines a distance 234 +/- 29 pc to the system
	(compared with 212 +/- 30 pc from the revised Hipparcos reduction of
	van Leeuwen 2007), a and total mass of 8.25 +/- 1.85 Msun. Derived	vlF2007
	spectral types, masses, and radii of the components are as follows:
	Aa1 A7 1.74 +/- 0.06 Msun 1.86 +/- 0.08 Rsun
	Aa2 A7 1.71 0.06 1.81 0.08
	Ab A1 2.4 0.4
	B 2.4 2.0	Zas2012b
STF1579	STTA113 = STFA 20.
	AB,C: H 1 72.	MEv2010
	May be a physical septuple: the 1.7d eclipsing pair (2), the 640d
	spectroscopic component (+1), the 118y resolved pair A 1777 (+1)
	and the wider cpm pair (+1) STF1579AB,D. STF1579AB,C also has similar
	proper motion and may be physical and the D component has been split
	interferometrically (BAG 46Da,Db).

REFERENCES

refcode	metd	author	reference
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Hrt1997	Sc j	Hartkopf, W.I., McAlister, H.A., Mason, B.D., ten Brummelaar, T.A., Roberts, J.C.,	1997AJ....114.1639H
Hrt1997		Jr., Turner, N.H., & Wilson, J.W.
Hrt1997		AJ 114, 1639, 1997
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
VlF2007	-	van Leeuwen, F.	2007A&A...474..653V
VlF2007		A&A 474, 653, 2007
Zas2012b	orb -	Zasche, P., Uhlar, R., Slechta, M., Wolf, M., Harmanec, P., Nemravova, J.A., &	2012A&A...542A..78Z
Zas2012b		Korcakova, D.
Zas2012b		A&A 542, A78, 2012

DISCOVERER

idgroup	discov	author
1	A	Aitken, R.G.
312	BAG	Balega, Y.Y. & Tikhonov, N.A.
335	BAG	Balega, I.I., Balega, Y.Y., Belkin, I.N., Maximov, A.F., Orlov, V.G., Pluzhnik,
335	BAG	E.A., Shkhagosheva, Z.U., & Vasyuk, V.A.
336	BAG	Balega, I.I., Balega, Yu.Yu., Falcke, H., Osterbart, R., Reinheimer, T., Scholler,
336	BAG	M., & Weigelt, G.
341	BAG	Balega, I.I., Balega, Y.Y., Maksimov, A.F., Pluzhnik, E.A., Shkhagosheva, Z.U., &
341	BAG	Vasyuk, V.A.
346	BAG	Balega, I.I., Balega, Yu.Yu., Hofmann, K.-H., Maksimov, A.F., Pluzhnik, E.A.,
346	BAG	Schertl, D., Shkhagosheva, Z.U., & Weigelt, G.
349	BAG	Balega, I.I., Balega, Y.Y., Maksimov, A.F., Pluzhnik, E.A., Schertl, D.,
349	BAG	Shkhagosheva, Z.U., & Weigelt, G.
352	BAG	Balega, I.I., Balega, Y.Y., Hofmann, K.-H., Pluzhnik, E.A., Schertl, D.,
352	BAG	Shkhagosheva, Z.U., & Weigelt, G.
355	BAG	Balega, I.I., Balega, Y.Y., Hoffmann, K.-H., Malogolovets, E., Schertl, D.,
355	BAG	Shkhagosheva, Z.U., & Weigelt, G.
357	BAG	Balega, I.I., Balega, Yu.Yu., Maksimov, A.F., Malogolovets, E.V., Pluzhnik, E.A.,
357	BAG	& Shkhagosheva, Z.
358	BAG	Balega, Y.Y., Beuzit, J.-L., Delfosse, X., Forveille, T., Perrier, C., Mayor, M.,
358	BAG	Segransan, D., Udry, S., et al.
359	BAG	Balega, I.I., Balega, Yu.Yu., Maksimov, A.F., Malogolovets, E.V., Rastegaev, D.A.,
359	BAG	Shkhagosheva, Z.U., & Weigelt, G.
366	BAG	Balega, Yu.Yu., Dyachenko, V.V., Maksimov, A.F., & Malogolovets, E.V.,
366	BAG	Rastegaev, D.A., & Romanyuk, I.I.
367	BAG	Balega, Yu.Yu., Dyachenko, V.V., Maksimov, A.F., & Malogolovets, E.V.,
367	BAG	Rastegaev, D.A., & Romanyuk, I.I.
368	BAG	Balega, I.I., Balega, Yu.Yu., Gasanova, L.T., Dyachenko, V.V., Maksimov, A.F.,
368	BAG	Malogolovets, E.V., Rastegaev, D.A., & Shkhagosheva, Z.U.
371	STF	Struve, F.G.W.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
11551+4629	STF1579	AB,C	2009	64	42	3.9	6.68	8.32		N D	115505.74+462836.6
11551+4629	STF1579	AB,C	2012	67	42	3.9	6.68	8.32		N D	115505.74+462836.6
11551+4629	STF1579	AB,C	2014	78	42	3.9	6.68	8.32	A3Vn	N	115505.74+462836.6
11551+4629	STF1579	AB,C	2017	80	42	3.9	6.68	8.32	A3Vn	N	115505.74+462836.6
11551+4629	STF1579	AB,C	2019	84	43	3.9	6.68	8.32	A3Vn	NU	115505.74+462836.6
11551+4629	STF1579	AB,C	2021	87	44	3.7	6.68	8.32	A3Vn	NU	115505.74+462836.6

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WDS 11551+4629 STF 1579 AB,C (65 UMa) : VISUAL OBSERVATIONS REPORTS

Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	23/05/30	Daedalus1	mean difficulty	separated	43		Very nice 2+1 configuration. Companion is blue-grey, Primary is much brighter.

WDS 11551+4629 STF 1579 AB,C (65 UMa) : MEASURES

Records found: 1

Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	23/05/30	Daedalus1	mean difficulty	3.77	0.08	43.00	0.00	1.63	12	Seeing: Pickering 7, good

WDS 11551+4629 (65 UMa) : VIRTUAL EYEPIECE

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WDS 11551+4629 (65 UMa) : ALADIN DSS IMAGE @

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

Error -22130
Not valid ID.

Error -22130
Not valid ID.
Error -27220
Not valid ID.