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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