CYGNUS

Cygnus is one of the richest constellations in the sky; it is often nicknamed the Northern Cross – certainly it is much more nearly cruciform then is Crus. Various legends are associated with it. According to one, the group was placed in the sky to honour a swan into which Jupiter once transformed himself when on a visit to the wife of the King of Sparta! There are 13 stars above the fourth magnitude. To these must be added the red variable c, which can rise above magnitude 4 at times.

(Abbreviation: Cyg)

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		19	17	06.0	+53	22	07	3.77	0.2	K0	52
10 i		19	29	42.1	+51	43	47	3.79	2.1	A5	41
6 b		19	30	43.1	+27	57	35	3.08	-2.3	K5	120 ALBIREO
8		19	31	46.1	+34	27	11	4.74	-2.3	B3	240
13 q		19	36	26.2	+50	13	16	4.48	2.1	F5	19
12 f		19	39	22.4	+30	09	12	4.69	1.8	G8	34
18 d		19	44	58.4	+45	07	51	2.87	-0.6	A0	49
c		19	50	33.7	+32	54	51	var.	0.2v	K0	25
21 h		19	56	18.2	+35	05	00	3.89	0.2	K0	52
33		20	13	23.7	+56	34	04	4.30	1.3	A3	39
31 o¹		20	13	37.7	+46	44	29	3.79	-2.2	K2	160
32 o²		20	15	28.1	+47	42	51	3.98	-3.4	K3	280
34 p		20	17	47.0	+38	01	59	var.	var.	B1p	1400
37 g		20	22	13.5	+40	15	24	2.20	-4.6	F8	230 SADR
39		20	23	51.4	+32	11	25	4.43	-0.2	K3	78
41		20	29	23.6	+30	22	07	4.01	-2.0	F5	160
47		20	33	54.0	+35	15	03	4.61	-4.4	K2	570
50 a		20	41	25.8	+45	16	49	1.25	-7.5	A2	560 DENEB
52		20	45	39.6	+30	43	11	4.22	0.2	K0	59
53 e		20	46	12.5	+33	58	13	2.46	0.2	K0	25 GIENAH
54 l		20	47	24.3	+36	29	27	4.53	-1.1	B5	130
58 n		20	57	10.2	+41	10	02	3.94	0.6	A0	45
59 f¹		20	59	49.3	+47	31	16	4.74v	-3.9	B1	480 (V.832 CYG)
62 x		21	04	55.7	+43	55	40	3.72	-4.4	K5	290
63		21	06	35.9	+47	38	54	4.55	-2.3	K4	220
64 z		21	12	56.0	+30	13	37	3.20	-2.1	G8	120
65 t		21	14	47.3	+38	02	44	3.72	1.7	F0	21
67 s		21	17	24.7	+39	23	41	4.23	-7.1	B9	1600
66 u		21	17	54.9	+34	53	48	4.43	-2.5	B2	240
73 r		21	33	58.7	+45	35	30	4.02	0.3	G8	56
80 p¹		21	42	05.5	+51	11	23	4.67	-1.7	B3	180 AZELFAFAGE
78	m¹ m²	21	44	08.2	+28	44	35	6.14	3.7	dF3	17 COMBINED MAG.4.4
78	m¹ m²	21	44	08.4	+28	44	34	4.78	3.7	F6	17 COMBINED MAG.4.4
81 p²		21	46	47.4	+49	18	35	4.23	-2.9	B3	250

DOUBLES

STAR	R.A.			DEC			MAGS.	P.A.	DIST.”
STAR	H	M	S	o	‘	“	MAGS.	P.A.	DIST.”
6 b	19	30	43.1	+27	57	35	3.2, 5.4	055	34.6 YELLOW BLUE. GLORIUS
18 d	19	44	58.4	+45	07	51	3.0, 6.5	246	2.1 BINARY; 321 YEARS
37 g	20	22	13.5	+40	15	24	2.2, 9.6	196	141.7 OPTICL
61	21	06	53.9	+38	44	58	5.5, 6.3	140	27.0 WIDENING

VARIABLES

STAR	R.A.		DEC		RANGE	PERIOD,D	SPEC	TYPE
STAR	H	M	o	‘	RANGE	PERIOD,D	SPEC	TYPE
CH	19	23.2	+50	09	6.6 – 7.8	97	M	SEMI-REGULAR
R	19	35.5	+50	05	6.5 – 14.2	426	S	MIRA
RT	19	42.2	+48	39	6.4 – 12.7	190	M	MIRA
c	19	50.6	+32	55	3.6 – 14.2	407	S	MIRA
Z	20	00.0	+49	54	7.6 – 14.7	264	M	MIRA
P	20	17.8	+38	02	3 – 6	-	B1p	PROTOTYPE P CYGNI STAR
CN	20	16.9	+59	38	7.3 – 14.0	199	M	MIRA
U	20	18.1	+47	44	6.7 – 11.4	465	N	MIRA. VERY RED
V	20	39.7	+47	58	7.7 – 13.9	421	N	MIRA
X	20	41.4	+35	24	6.5 – 8.2	16.4	F-G	CEPHEID
Y	20	50.1	+34	28	7.0 – 7.6	2.996	B	ECLIPSING
W	21	34.1	+45	09	5.0 – 7.6	±130	M	SEMI-REGULAR?
T	20	45.2	+34	11	5.0 – 5.5	-	K	IRREGULAR
RV	21	41.2	+37	47	7.1 – 9.3	±300	N5	SEMI-REGULAR?
WY	21	46.9	+44	01	7.5 – 14.0	304	M	MIRA

CLUSTERS AND NEBULÆ

OBJECT	R.A.		DEC		TYPE	NOTES
OBJECT	H	M	o	‘	TYPE	NOTES
NGC 6826	19	43.4	+50	42	PLANETARY	MAG. 9; CENTRE STAR MAG. 10.8
NGC 6871	20	04.0	+35	38	OPEN CLUSTER	MAG. 5.6 (27 CYGNI). 60 STARS
NGC 6884	20	08.8	+46	19	PLANETARY	MAG. 13. VERY FAINT STAR
NGC 6913 M.29	20	22.2	+38	21	OPEN CLUSTER	MAG. 7. SPARSE; ABOUT 20 STARS
NGC 7027	21	05.1	+42	02	PLANETARY	MAG. 10. CENTRE STAR MAG. 17
NGC 7086	21	29.8	+51	22	OPEN CLUSTER	MAG. 9.4. ABOUT 50 STARS
NGC 7092	21	30.4	+48	13	OPEN CLUSTER	MAG. 5.2. ABOUT 25 STARS
NGC 6946	21	33.9	+59	58	GALAXY	MAG. 10. TYPE Sc
NGC 6914	20	23.4	+42	10	NEBULA	NEAR g
NGC 6960	20	43.6	+30	32	NEBULA	CIRRUS NEBULA (52 CYGNI)
I 5067	20	46.9	+44	11	NEBULA	PELICAN NEBULA, NEAR DENED
NGC 6992-5	20	54.3	+31	30	NEBULA	CIRRUS NEBULA
I 5146	21	51.3	+47	02	NEBULA	COCOON NEBULA