AAVSO HOME > observing > programs > solar > sunspot numbers > dec 99
 
 
 
Observing
Observing Programs
  Visual
  CCD
  Exoplanet Transit Search
  High Energy Network
  Photoelectric (PEP)
  Infrared Photometry
  Supernova Search
  Nova Search
  Eclipsing Binary
  RR Lyrae
  Sunspots and SID
  Observing Campaigns
Observing Aids
Submit Observations
Charts
 
Main sections of web
The AAVSO
Variable Stars
Observing
Access Data
Publications
Support
Education and Outreach
 
Pick a star

Create a light curve
Recent Observations
Find charts
VSX      
 

American Relative Sunspot Numbers for December 1999

DayMn. Raw Ras.d.       Mn. Rak  s.d.
1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31
105

91

82

75

68

77

75

101

119

135

116

120

111

118

112

115

117

116

124

112

118

125

114

109

98

106

88

85

88

68

70
6.4

5.0

4.7

4.5

4.3

6.1

4.7

5.7

6.6

8.5

6.4

7.1

6.6

9.4

15.1

11.4

9.5

6.4

6.5

8.7

8.7

12.4

10.6

6.8

5.4

10.3

5.8

4.8

6.3

7.6

5.5
  98

79

69

61

61

69

63

85

100

114

98

101

93

92

91

95

106

104

102

101

103

99

92

94

89

86

73

72

73

62

58
5.2

4.0

3.3

2.7

3.6

5.9

2.8

4.5

4.9

4.1

4.6

5.3

4.8

5.5

9.0

7.4

6.1

4.4

3.5

5.0

6.6

6.8

6.1

5.1

4.1

7.9

3.2

2.3

5.1

7.5

5.4
Means:101.8  86.5 
No. of Observers: 66

Return to AAVSO Solar Committee page.

 
  search engine |  site map |  links |  contact us