Sunspots Observation 2011 February

Year:  2011
Month: February

OBSERVER:      German Morales C.
               Astronomia Sigma Octante

Instr.:  SCT 
    Fl:  2000mm    Aperture:  200mm    Aperture stop used:  90mm

    Method:  Projection    Image diameter: 140mm


Day  UT  Q  g   s   R Ng  Ns  NR Sg  Ss  SR  cR   CV  IS M Cld Remarks     

  1 2040 3  1  12  22  0   0   0  1  12  22  22   19  13    85 
  2 1430 3  1   7  17  0   0   0  1   7  17  17   19   8    70 
  3 1520 3  2  11  31  0   0   0  2  11  31  31   23  13    25 
  4 1800 2  1   7  17  0   0   0  1   7  17  17    7   8   100 st. cirrus  
  5 1440 3  2  10  30  1   5  15  1   5  15  15   14  12    85 
  6                                                      ! 100 Rain        
  7 1350 3  1   4  14  1   4  14  0   0   0   0    8   5    40 
  8                                                      ! 100 rain        
  9 1840 3  2  20  40  1  11  21  1   9  19  19   28  22    25 
 10 1700 3  1  12  22  0   0   0  1  12  22  22   22  13    65 
 11                                                      ! 100 raIn        
 12 1430 4  4  27  67  2   8  28  2  19  39  54   40  31     5 
 13 1500 3  4  34  74  2   8  28  2  26  46  46   63  38    60 
 14 2000 3  3  36  66  2   8  28  1  28  38  52   59  39    75 
 15 1910 2  3  30  60  2  13  33  1  17  27  27   56  33   100 st. cirrus  
 16 1410 4  3  37  67  2  15  35  1  22  32  32   68  40    10 cirrus      
 17 1540 3  2  33  53  1  11  21  1  22  32  21   54  35    80 st. cirrus  
 18                                                      ! 100 RAIn        
 19                                                      ! 100 RAiN        
 20 2100 3  2  26  46  2  26  46  0   0   0  27   53  28    75 
 21                                                      ! 100 RAIN        
 22 1800 3  2  13  33  2  13  33  0   0   0   0   47  15    70 
 23 1500 3  2  10  30  2  10  30  0   0   0   0   38  12    50 
 24 1720 3  1   2  12  1   2  12  0   0   0   0    7   3    60 
 25 1830 3  2   8  28  2   8  28  0   0   0   0   14  10    75 
 26                                                      ! 100 RaiN        
 27                                                      ! 100 RaiN        
 28 1900 3  3  19  49  2  14  34  1   5  15  15   33  22    60 


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Sunspots observation summary
Year:  2011
Month: February

OBSERVER:      German Morales C.
               Astronomia Sigma Octante

Monthly Mean     R =  38.9     

                NR =  20.3    SR =  18.6    cR =  20.9

                CV =  33.6    IS =  20.0

                 Q =   3.0   Cld =  72.0%

The Sun has been observed 20 days on 28 possible.
8 cloudy days impede observe the Sun

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Column Headings

UT:     UTC at middle of observation
Q:      Quality seeing
        1 Bad, 2 Poor, 3 Fair, 4 Good, 5 Excelent

R:      Wolf relative number for whole disc
         g: Total Groups,  s: Total Spots
NR:     Wolf Relative number North hemisphere
         Ng: North Groups,  Ns: North Spots
SR:     Wolf Relative number South hemisphere
         Sg: South Groups,  Ss: South Spots
cR:     Wolf Relative number Central
CV:     Classification Value after Malde for whole disc
IS:     Inter Sol index for whole disc

M:   !  Cloudy all day
     *  Cloudy at observation hours
     X  Impossible to make any kind of observation
Cld:    Percentage of cloudy sky

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