CASSIOPEIA

CASSIOPEIA

(Abbreviation: Cas).

An original constellation – one of the most distinctive in the sky. Mythologically, Cassiopeia was Andromeda’s mother and wife of Cepheus; it was her boasting which led to the unfortunate contretemps with Neptune’s sea-monster. There are seven stars above magnitude 4. Of these,g (Cih) is variable, and is also suspected that a (Shedir) is variable over a small range – possibly 2.1 to 2.4 though opinions differ. c, which looks obscure, is extremely luminous. There are 8 stars brighter then magnitude 4:

BRIGHTEST STARS

STAR	R.A.			DEC			MAG.	ABS.MAG.	SPEC	DIST.PC
STAR	H	M	S	o	‘	“	MAG.	ABS.MAG.	SPEC	DIST.PC
7 r	23	54	22.9	+57	29	58	var.	-8.0	F8	1500
11 b	00	09	10.6	+59	08	59	2.27	1.9	F2	13 CHAPH
14 l	00	31	46.3	+54	31	20	4.73	-0.9	B8	13
15 k	00	32	59.9	+62	55	55	4.16	-6.6	B1	930
17 z	00	36	58.2	+53	53	49	3.67	-2.5	B2	170
18 a	00	40	30.4	+56	32	15	2.23v?	-0.9	KO	37 SHEDIR
22 o	00	44	43.4	+48	17	04	4.54	-2.5	B2	210
24 h	00	49	05.9	+57	48	58	3.44	4.6	GO	5.9 ACHIRD
28 n	00	56	39.7	+59	10	52	4.63	1.8	G8	29
27 g	00	56	42.4	+60	43	00	2.2v	-4.6	BOp	240 CIH
33 q	01	11	06.1	+55	09	00	4.33	2.4	A7	37 MARFAK
37 d	01	25	48.9	+60	14	07	2.68	2.1	A5	19 RUCHBAH
36 y	01	25	55.9	+68	07	48	4.74	0.2	KO	74
39 c	01	33	55.8	+59	13	56	4.71	0.2	KO	80
45 e	01	54	23.6	+63	40	13	3.38	-2.9	B3	160 SEGIN
48	02	01	57.3	+70	54	26	4.48	1.9	A4	33
50 i	02	03	26.0	+72	25	17	3.98	1.2	A1	36

DOUBLES

STAR	R.A.			DEC			MAGS.	P.A.	DIST.”
STAR	H	M	S	o	‘	“	MAGS.	P.A.	DIST.”
8 s	23	59	00.4	+55	45	18	5.1, 7.2	332	3.1 V. SLOW BINARY
24 h	00	49	05.9	+57	48	58	3.6, 7.5	193	10.1 BINARY; OVER 500 YEARS
27 g	00	56	42.4	+60	43	00	var, 11.0	248	2.1 FIXED
36 y	01	25	55.9	+68	07	48	5.0, 9.8	112	26.2 B IS DOUBLE (3”)
50 i	02	03	26.0	+72	25	17	4.7, 7.0, 7.1	240, 116	2.3, 8.2 LITTLE CHANGE

.VARIABLES

STAR	R.A.		DEC		RANGE	PERIOD, D	SPEC	TYPE
STAR	H	M	o	‘	RANGE	PERIOD, D	SPEC	TYPE
V	23	09.5	+59	25	7.3---12.8	228	M	MIRA
r	23	54.4	+57	30	4.1---6.2	?	F8	TYPE UNKNOWN; IRREG?
R	23	55.9	+51	07	5.5---13.0	431	M	MIRA
a	00	40.5	+56	32	2.0---2.4?	?	KO	SUSPECTED VARIABLE
U	00	43.6	+47	58	7.0---15.4	429	M	MIRA
g	00	56.7	+60	43	1.6---3.2	---	BOp	IRREGULAR
S	01	16.0	+72	21	7.0---15.2	611	S	MIRA
RZ	02	44.3	+69	26	6.4---7.8	1.2	A	ECLIPSING
SU	02	47.5	+68	41	5.9---6.3	1.9	F-G	CEPHEID

.CLUSTERS AND NEBULÆ.

OBJECT	R.A.		DEC		TYPE	NOTES
OBJECT	H	M	o	‘	TYPE	NOTES
NGC 7654 M.52	23	22.0	+61	19	OPEN CLUSTER	MAG. 7.3. NOT DISTINCTIVE
NGC 7789	23	45.5	+56	26	OPEN CLUSTER	MAG. 9.6. ABOUT 200 STARS
NGC 40	00	10.2	+72	15	PLANETARY	MAG. 10.2. OVAL; 11.4m CENTRAL STAR
NGC 103	00	22.6	+61	03	OPEN CLUSTER	MAG. 10.8. RICH
NGC 129	00	27.0	+59	57	OPEN CLUSTER	MAG. 10. FAIRLY RICH
NGC 133	00	28.4	+63	04	OPEN CLUSTER	MAG. 9. FAIRLY RICH
NGC 146	00	30.3	+63	01	OPEN CLUSTER	MAG. 10. FAIRLY RICH
NGC 225 (H.VIII.78)	00	40.6	+61	31	OPEN CLUSTER	MAG. 9. FAIRLY RICH CLUSTER
NGC 281	00	50.4	+56	19	NEBULA	MAG. DISTANCE OVER 5000 LIGHT-YEARS
NGC 381	01	05.2	+61	18	OPEN CLUSTER	MAG. 9. FAIRLY RICH
NGC 475 (H.VIII.42)	01	06.0	+58	03	OPEN CLUSTER	RICH
NGC 457	01	15.9	+58	04	OPEN CLUSTER	MAG. 7.5. OVER 100 STARS
NGC 559	01	26.1	+63	02	OPEN CLUSTER	MAG. 7.3. FAIRLY RICH
NGC 581 (M.103)	01	29.9	+60	27	OPEN CLUSTER	MAG. 7.4. LOOSE AND POOR
NGC 663 (H.VI.31)	01	42.5	+61	00	OPEN CLUSTER	MAG. 7.1. VISIBLE IN FINDER
I. 289	03	06.2	+61	02	PLANETARY	MAG. 12.3 CENTAL STAR MAG. 15