18501+3322 BU 293 AC

Coord 2000	18501+3322		Discov num	BU  293		Comp	AC		Coord arcsec 2000	18 50 04.79 +33 21 45.6
Date first	1878		Date last	2015		Obs	8
Pa first	248		Pa last	247.2		P.A. Now (θ)	247.2°
Sep first	46.3		Sep last	46.778		Sep. Now (ρ)	46.778"
Mag pri	3.63		Mag sec	13.00		delta mag (ΔM)	9.37		Spectral class	B7Ve (blue-white)
Pri motion ra	+002		Sec motion ra	-002
Pri motion dec	-004		Sec motion dec	-002
Notes	N S (See Notes, Parallax indidates non-physical)

rPM=1 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		67451	18 50 05 +33 21 46	CIA 3 Aa1,2	2007	14	88	0.0	3.60	4.00	0.40	Y
Show		67451	18 50 05 +33 21 46	RBR 11 Aa,Ab	2002	1	176	0.5	3.60	8.20	4.60
Show	Sheliak	67451	18 50 05 +33 21 46	STFA 39 AB	2017	117	149	45.7	3.63	6.69	3.06
Show		67451	18 50 05 +33 21 46	BU 293 AC	2015	8	247	46.8	3.63	13.00	9.37		<===
Show		67451	18 50 05 +33 21 46	BU 293 AD	2015	8	68	64.0	3.63	14.30	10.67
Show		67451	18 50 05 +33 21 46	BU 293 AE	2015	37	317	67.2	3.63	10.14	6.51
Show		67451	18 50 05 +33 21 46	BU 293 AF	2015	36	18	86.0	3.63	10.62	6.99
Show		67453	18 50 07 +33 21 07	BU 293 BE	2015	14	322	112.4	6.69	10.13	3.44
Show		67453	18 50 07 +33 21 07	BU 293 BF	2015	14	1	120.6	6.69	10.62	3.93
Show			18 50 01 +33 22 35	BU 293 EF	2015	11	66	79.4	10.14	10.62	0.48

Octuple system
6 estimated visually detectable stars in this system

Common name	Sheliak		Constellation	Lyra		SAO	67451		HIP	92420
Tycho2	2642-02929-1		Gaia DR2	2090687795054381056		HD	174638		HR	7106
GC	25847		ADS	11745		BD	BD+33 3223		Bayer	Beta Lyrae
Bayer name	Bet Lyr		Flamsteed	10 Lyrae		Flamsteed name	10 Lyr		FK5	705
Distance	294.99		Distance ly	962.26		Bayer greek	β Lyr

Other names

SHILIAK, Shelyak

Meaning

turtle (carapace)

discov_num	notes	refcode
STFA 39	STTA175. A is 10 Lyr = Sheliak = bet Lyr, the prototype variable of
	its class. B is BD+33@3224.
	AB: H 5 3.	MEv2010
CIA 3	Aa1,2: bet Lyr. Eclipsing binary (P=12.9d) resolved by CHARA Array
	(Zhao et al. 2008). Reductions by two techniques (MACIM and BSMEM) and	CIA2008b
	a model fit listed in paper; MACIM and BSMEM results given in WDS and
	Interferometric Catalog. Three possible orbital solutions also given,
	adopting period and Tmin from Ak et al. (2007 A&A 463, 233) and e=0
	(Harmanec 2002 ANac 323, 87). These yield distance estimates ranging
	from 271 to 313 pc; masses for the gainer and donor are 12.76 +/- 0.27
	and 2.83 +/- 0.18 Msun, respectively.
	Aa1,2: Malkov et al. (2012) derive dynamical and spectroscopic masses
	19.84 +/- 11.13 and 15.84 Msun, respectively.	Mlk2012
	In addition to the close pair there is also a hot spot with a size of	IAU2014b
	22-33 solar radii. What is unknown is where the mass is lost and how
	much matter is in the jets.

refcode	metd	author	reference
CIA2008b	Kc j	Zhao, M., Gies, D., Monnier, J.D., Thureau, N., Pedretti, E., Baron, F.,	2008ApJ...684L..95Z
CIA2008b	+orb	Merand, A., ten Brummelaar, T., McAlister, H., Ridgway, S.T., Turner, N.,
CIA2008b		Sturmann, J., Sturmann, L., Farrington, C., & Goldfinger, P.J.
CIA2008b		ApJ 684, L95, 2008
IAU2014b	-	Lomax, J. (IAU Symposium 307, in press)	.
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012

idgroup	discov	author
1	BU	Burnham, S.W. (BU 1 - 81)
179	RBR	Roberts, L.C., Jr. & Neyman, C.R.
180	RBR	Roberts, L.C., Jr., Turner, N.H., Bradford, L.W., ten Brummelaar, T., Oppenheimer,
180	RBR	B., Kuhn, J., Whitman, K., Perrin, M., et al.
185	RBR	Roberts, L.C., Jr., Gies, D.R., Parks, J.R., Grundstrom, E.D., McSwain, M.,
185	RBR	Berger, D., Mason, B., ten Brummelaar, T. & Turner, N.
192	RBR	Roberts, L.C., Jr., Turner, N.H., ten Brummelaar, T.A., Mason, B.D., &
192	RBR	AJ 142, 175, 2011
192	RBR	Roberts, L.C., Jr., Rice, E.L., Beichman, C.A., Brenner, D., Burruss, R.,
192	RBR	Crepp, J.R., Dekany, R.G., Hillenbrand, L.A., Hinkley, S., Ligon, E.R.,
192	RBR	Lockhart, T.G., King, D., et al.
193	RBR	Roberts, L.C., Jr., Bouchez, A.H., Roberts, J.E., Burruss, R., Crepp, J.R., Mawet,
193	RBR	D., Ohara, C.M., Cromer, J.L., Dekany, R.G., Troy, M., Velur, V. & Li, J.
194	RBR	Roberts, L.C., Jr., Tokovinin, A., Mason, B.D., Riddle, R.L., Hartkopf, W.I.,
194	RBR	Law, N.M., & Baranec, Ch.
195	RBR	Roberts, L.C., Jr., Mason, B.D., Neyman, C.R., Wu, Y., Riddle, R.L., Shelton, J.,
195	RBR	Angione, J., Baranec, Ch., Bouchez, A., Bui, K., Burruss, R., Burse, M., et al.
196	RBR	Roberts, L.C., Jr., Oppenheimer, R., Crepp, J.R., Baranec, Ch., Beichman, C.A.,
196	RBR	Brenner, D., Burruss, R., Cady, E., Luszcz-Cook, S., Dekany, R.,
196	RBR	Hillenbrand, L.A., Hinkley, S., et al.
199	RBR	Roberts, L.C., Jr., Mason, B.D., Aguilar, J., Carson, J., Crepp, J., Beichman, C.,
199	RBR	Brenner, D., Burruss, R., Cady, E., Luszcz-Cook, S., Dekany, R., Hillenbrand, L.,
199	RBR	et al.
204	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18501+3322	BU 293	AC	2007	5	247	47.1	3.63	13.00	B7Ve	D	185004.79+332145.6
18501+3322	BU 293	AC	2014	7	247	46.4	3.63	13.00	B7Ve	N	185004.79+332145.6
18501+3322	BU 293	AC	2015	8	247	46.8	3.63	13.00	B7Ve	N	185004.79+332145.6

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No records found.

Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	14/06/27	warin	very easy	46.00		228.00		1.77	1

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