LYRA

(Abbreviation: Lyr).

A small constellation, but a very interesting one; it is graced by the presence of the brilliant Vega, as well as the prototype eclipsing binary b Lryæ, the quadruple Î Lryæ, and the ‘Ring Nebula’ M.57. Mythlogically it represents the harp, which Apollo gave to the great musician Orpheus.

BRIGHTEST STARS

STAR	R.A.			DEC			MAG.	ABS.MAG.	SPEC	DIST.PC
STAR	H	M	S	o	‘	“	MAG.	ABS.MAG.	SPEC	DIST.PC
1 k	18	19	51.5	+36	03	52	4.33	-0.1	K2	77
3 a	18	36	56.2	+38	47	01	0.03	0.5	AO	8.1 VEGA L/Y 26
4 Î¹	18	44	20.1	+39	40	15	4.67	1.7	A3	38
5 Î²	18	44	22.7	+39	36	46	5.1	2.1	A5	38
6 z¹	18	44	46.2	+37	36	18	4.36	1.2	A3	64
7 z²	18	44	48.0	+37	35	40	5.73	0.8	FO	64
10 b	18	50	04.6	+33	21	46	var	-0.6	B7	92 SHELIAK
12 d²	18	54	30.0	+36	53	56	4.30v	-2.4	M4	220
13 R	18	55	19.9	+43	56	46	var	var	M5	40
14 g	18	58	56.4	+32	41	22	3.24	-0.8	B9	59 SULAPHAT
20 h	19	13	45.3	+39	08	46	4.39	-3.0	B2	270 ALADFAR
21 q	19	16	21.9	+38	08	01	4.36	-2.1	KO	170

DOUBLES

STAR	R.A.			DEC			MAGS.	P.A.	DIST.”
STAR	H	M	S	o	‘	“	MAGS.	P.A.	DIST.”
4 Î¹	18	44	20.1	+39	40	15	5.1,6.0	002	Î¹ & Î² MAKE A NAKED-EYE PAIR; SEPARATION 207”.8
5 Î²	18	44	22.7	+39	36	46	5.1,5.4	101	Î¹ & Î² MAKE A NAKED-EYE PAIR; SEPARATION 207”.8
10 b	18	50	04.6	+33	21	46	var,7.8	149	LITTLE CHANGE
20 h	19	13	45.3	+39	08	46	4.4,8.7	082	FIXED

z¹ & z² ARE SEPARATED BY 43”.7; P.A. 150º; FIXED.

VARIABLES

STAR	R.A.		DEC		RANGE	PERIOD,D	SPEC	TYPE
STAR	H	M	o	‘	RANGE	PERIOD,D	SPEC	TYPE
W	18	13.2	+36	39	7.5---13.0	196	M	MIRA
T	18	30.7	+36	58	7.8---9.6	-	R	IRREGULAR VERY RED
10 b	18	50.1	+33	22	3.4---4.3	12.91	B7	PROTOTYPE b LYRÆ STAR
R	18	55.3	+43	57	4.0---5.0	±47	M	SEMI-REGULAR
RR	19	23.9	+42	41	7.1---8.0	0.5668	A-F	PROTOTYPE RR LYRÆ STAR

CLUSTERS AND NEBULÆ

OBJECT	R.A.		DEC		TYPE	NOTES
OBJECT	H	M	o	‘	TYPE	NOTES
NGC 6720 M.57	18	51.7	+32	58	PLANETARY	RING NEBULA.MAG.9. CENTER STAR MAG.14
NGC 6779 M.56	19	14.6	+30	05	GLOBULAR	MAG.8.2.RICH AREA