Sunspots Observation 2011 April

Year:  2011
Month: April

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                                                      * 100 
  2 1750 3  3  26  56  2  22  42  1   4  14  30   48  29    30 
  3 1620 3  3  32  62  3  32  62  0   0   0  49   45  35   100 st. cirrus  
  4                                                      * 100 
  5                                                      ! 100 rAIn        
  6 1540 3  3  20  50  3  20  50  0   0   0   0   37  23    80 
  7 1500 4  4  28  68  3  26  56  1   2  12  12   64  32     0 
  8                                                      ! 100 
  9 1850 3  4  21  61  3  16  46  1   5  15  18   55  25    65 
 10 1550 3  3  32  62  2  30  50  1   2  12  62   48  35    60 cirrus      
 11 1550 3  4  41  81  3  39  69  1   2  12  61   71  45     5 
 12                                                      X     
 13 1650 4  7  55 125  7  55 125  0   0   0  52   99  62     0 
 14 1800 2  5  46  96  5  46  96  0   0   0  32  102  51    60 
 15 1540 3  8  63 143  7  58 128  1   5  15  35  115  71   100 st. cirrus  
 16 1610 3  3  45  75  3  45  75  0   0   0  12   85  48    30 cirrus      
 17 1730 3  4  38  78  4  38  78  0   0   0  58   85  42   100 cirrus      
 18 1550 3  3  28  58  3  28  58  0   0   0  40   76  31    70 
 19 1310 4  4  23  63  3  19  49  1   4  14  35   83  27     0 
 20 1530 3  3  28  58  2  19  39  1   9  19  27   58  31    30 cirrus      
 21 1630 4  3  27  57  1  14  24  2  13  33   0   67  30     0 
 22 1520 4  3  47  77  1  13  23  2  34  54   0   71  50     0 
 23 1600 3  3  37  67  1  11  21  2  26  46  31   51  40    20 cirrus      
 24 1800 3  3  30  60  1   9  19  2  21  41  26   49  33    80 
 25 1700 3  1  12  22  0   0   0  1  12  22  22   25  13    80 
 26 1740 3  2  20  40  1  10  20  1  10  20  40   44  22    25 
 27 1640 3  2  17  37  1   8  18  1   9  19  19   50  19     0 
 28 1610 4  3  19  49  2  11  31  1   8  18   0   60  22     0 
 29 1820 4  4  24  64  2  11  31  2  13  33  17   70  28     0 
 30 1530 4  5  27  77  3  15  45  2  12  32  20   77  32     5 


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Sunspots observation summary
Year:  2011
Month: April

OBSERVER:      German Morales C.
               Astronomia Sigma Octante

Monthly Mean     R =  67.4     

                NR =  50.2    SR =  17.2    cR =  27.9

                CV =  65.4    IS =  35.0

                 Q =   3.3   Cld =  46.2%

The Sun has been observed 25 days on 30 possible.
4 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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