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SERPENS

 

(Abbreviation: Ser)

 

A curious constellation inasmuch as it is divided into two parts:  Caput (the Head) and Cauda (the Body).  It evidently represents the serpent with which Ophiuchus is struggling – and has had the worst of the encounter, since it has been pulled in half!  Caput contains six stars above the fourth magnitude, and Cauda three: 

 

BRIGHTEST STAR

 

STAR

R.A.

DEC

MAG.

ABS. MAG.

SPEC

DIST.PC

H

M

S

o

‘

“

CAPUT

13 d

15

34

48.0

+10

32

21

3.80

1.7

F0

27

21 i

15

41

33.0

+19

40

13

4.52

1.2

A1

36

24 a

15

44

16.0

+06

25

32

2.65

-0.1

K2

26  UNUKALHAI

28 b

15

46

11.2

+15

25

18

3.67

0.6

A2

37

27 l

15

46

26.5

+07

21

12

4.43

4.4

G0

11

35 k

15

48

44.3

+18

08

29

4.09

-0.5

M1

78

32 m

15

49

37.1

-03

25

49

3.54

0.6

A0

44

37 e

15

50

48.9

+04

28

40

3.71

1.6

A2

33

41 g

15

56

27.1

+15

39

42

3.85

3.7

F6

12

CAUDA

53 n

17

20

49.4

-12

50

48

4.33

1.2

A1

42

55 x

17

37

35.0

-15

23

55

3.54

1.7

F0

23

56 o

17

41

24.7

-12

52

31

4.26

1.4

A2

36

57 z

18

00

28.7

-03

41

25

4.62

3.1

F3

22

58 h

18

21

18.4

-02

53

56

3.26

1.7

K0

16

63 q

18

56

13.0

+04

12

13

4.06

2.1

A5

COMBINED MAG.3.4 ALYA

18

56

14.5

+04

12

07

4.98

2.1

A5

 

DOUBLES

 

STAR

R.A.

DEC

MAGS.

P.A.

DIST.”

H

M

S

o

‘

“

13 d

15

34

48.0

+10

32

21

4.2, 5.2

179

WIDENING

28 b

15

46

11.2

+15

25

18

3.7, 9.0

265

LITTLE CHANGE

53 n

17

20

49.4

-12

50

48

4.3, 8.5

028

P.A. DECREASING

63 q

18

56

14

+04

12

10

4.06, 4.98

103

FIXED.  WIDE, EASY

 

VARIABLES

 

STAR

R.A.

DEC

RANGE

PEROID,D

SPEC

TYPE

H

M

o

‘

S

15

19.3

+14

30

7.7 – 14.1

367

M

MIRA

R

15

48.4

+15

17

5.7 – 14.4

357

M

MIRA

U

16

04.9

+10

04

7.8 – 14.0

238

M

NIRA

 

 

 

CLUSTERS AND NEBULΖ

 

OBJECT

R.A.

DEC

TYPE

NOTES

H

M

o

‘

NGC5904  M.5

15

16.0

+02

16

GLOBULAR

MAG. 6.2 FINE GLOBULAR

NGC5921

15

19.5

+05

15

GALAXY

MAG. 12. TYPE SBb

I      4593

16

09.5

+12

12

PLANETARY

MAG. 10.2. CONCENTRATED

H.   19

18

14.5

-13

18

OPEN CLUSTER

MAG. 12. CONCENTRATED

NGC6611  M.16

18

16.0

-13

48

NEBULA + CLUSTER

MAG. 7. EASY OBJECT

I      4756

18

36.6

+05

26

OPEN CLUSTER

MAG.5. RICH CLUSTER

 

 

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