18501+3322 CIA 3 Aa1,2

Coord 2000	18501+3322		Discov num	CIA   3		Comp	Aa1,2		Coord arcsec 2000	18 50 04.79 +33 21 45.6
Date first	2006		Date last	2007		Obs	14
Pa first	61		Pa last	87.7		P.A. Now (θ)	87.7°
Sep first	0.0		Sep last	0.001		Sep. Now (ρ)	0.001"
Mag pri	3.60		Mag sec	4.00		delta mag (ΔM)	0.4		Spectral class	B8Iab (blue-white)
Pri motion ra	+002		Sec motion ra
Pri motion dec	-004		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is 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)

Identifier	18501+3322
coord_arcsec_2000	185004.79+332145.6

Period (P)	12.9414d		Periastron (T)	54283.043d (2007.498y)		Semi-major axis (a)	0.865m	± 0.048
Eccentricity (e)	0		Inclination (i)	92.25°	± 0.82	Longitude of periastron (ω)	0°
Node (Ω)	254.39°	± 0.83	Notes	n		Reference	CIA2008b
Equinox	2000		Last observation	2007		Grade	5	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 76.4 0.001 2001-01-01 72.6 0.001 2002-01-01 258.4 2003-01-01 253.6 0.001 2004-01-01 87.4 2005-01-01 74.4 0.001 2006-01-01 61.8 2007-01-01 255.2 0.001 2008-01-01 250.4 2009-01-01 76.2 0.001 2010-01-01 72.4 0.001 2011-01-01 258.1 2012-01-01 253.5 0.001 2013-01-01 85.4 2014-01-01 74.3 0.001 2015-01-01 59.1 2016-01-01 255.1 0.001 2017-01-01 250.1 2018-01-01 76.1 0.001 2019-01-01 72.3 0.001 2020-01-01 257.9 2021-01-01 253.4 0.001 2022-01-01 83.9 2023-01-01 74.3 0.001 2024-01-01 55.1 2025-01-01 255.0 0.001 2026-01-01 249.8 2027-01-01 76.0 0.001 2028-01-01 72.2 0.001 2029-01-01 257.6 2030-01-01 253.4 0.001		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Identifier	18501+3322
coord_arcsec_2000	185004.79+332145.6

Period (P)	12.9414d		Periastron (T)	54283.043d (2007.498y)		Semi-major axis (a)	0.976m	± 0.083
Eccentricity (e)	0		Inclination (i)	92.1°	± 1.24	Longitude of periastron (ω)	0°
Node (Ω)	253.22°	± 1.97	Notes	n		Reference	CIA2008b
Equinox	2000		Last observation	2007		Grade	5	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 75.1 0.001 2001-01-01 71.5 0.001 2002-01-01 257.0 2003-01-01 252.5 0.001 2004-01-01 85.4 2005-01-01 73.2 0.001 2006-01-01 61.5 2007-01-01 254.0 0.001 2008-01-01 249.5 2009-01-01 74.9 0.001 2010-01-01 71.4 0.001 2011-01-01 256.7 0.001 2012-01-01 252.4 0.001 2013-01-01 83.5 2014-01-01 73.2 0.001 2015-01-01 58.9 2016-01-01 253.9 0.001 2017-01-01 249.2 2018-01-01 74.8 0.001 2019-01-01 71.3 0.001 2020-01-01 256.5 0.001 2021-01-01 252.3 0.001 2022-01-01 82.1 2023-01-01 73.1 0.001 2024-01-01 55.1 2025-01-01 253.8 0.001 2026-01-01 248.9 2027-01-01 74.7 0.001 2028-01-01 71.2 0.001 2029-01-01 256.3 0.001 2030-01-01 252.3 0.001		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Identifier	18501+3322
coord_arcsec_2000	185004.79+332145.6

Period (P)	12.9414d		Periastron (T)	54283.043d (2007.498y)		Semi-major axis (a)	0.993m	± 0.122
Eccentricity (e)	0		Inclination (i)	91.96°	± 1.65	Longitude of periastron (ω)	0°
Node (Ω)	251.87°	± 1.83	Notes	n		Reference	CIA2008b
Equinox	2000		Last observation	2007		Grade	5	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 73.6 0.001 2001-01-01 70.3 0.001 2002-01-01 255.4 2003-01-01 251.2 0.001 2004-01-01 83.3 2005-01-01 71.9 0.001 2006-01-01 60.9 2007-01-01 252.6 0.001 2008-01-01 248.4 2009-01-01 73.5 0.001 2010-01-01 70.2 0.001 2011-01-01 255.1 0.001 2012-01-01 251.1 0.001 2013-01-01 81.5 2014-01-01 71.8 0.001 2015-01-01 58.5 2016-01-01 252.5 0.001 2017-01-01 248.2 2018-01-01 73.4 0.001 2019-01-01 70.1 0.001 2020-01-01 254.9 0.001 2021-01-01 251.0 0.001 2022-01-01 80.2 2023-01-01 71.8 0.001 2024-01-01 54.9 2025-01-01 252.4 0.001 2026-01-01 247.9 2027-01-01 73.3 0.001 2028-01-01 70.0 0.001 2029-01-01 254.7 0.001 2030-01-01 251.0 0.001		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic