Sunspots Observation for 2021 June
1 Observer=================================================================
Sunspots Observation 2021 JUNE
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Year: 2021
Month: June
OBSERVER: Igor Grágeda M.
Astronomia Sigma Octante
Instr.: RFR
Fl: 600mm Aperture: 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 1500 3 1 7 17 1 7 17 0 0 0 17 8 8 10
2 1620 3 2 8 28 1 6 16 1 2 12 16 13 10 0
3 1740 3 2 7 27 1 5 15 1 2 12 15 22 9 10
4 1410 3 2 8 28 1 4 14 1 4 14 0 19 10 80 st.cirrus
5 1510 3 2 6 26 1 2 12 1 4 14 14 18 8 10
6 2025 3 3 6 36 1 1 11 2 5 25 13 20 8 80 st.cirrus
7 1420 3 2 8 28 0 0 0 2 8 28 17 29 9 0
8 * 100
9 1425 3 1 4 14 0 0 0 1 4 14 0 25 5 10
10 1540 3 1 3 13 1 3 13 0 0 0 13 2 4 70 st.cirrus
11 * 100
12 2015 3 1 1 11 1 1 11 0 0 0 0 10 1 0
13 1300 3 1 1 11 1 1 11 0 0 0 0 10 1 0
14 1330 3 1 4 14 1 4 14 0 0 0 0 11 5 0
15 1250 3 1 1 11 1 1 11 0 0 0 0 10 1 0
16 1345 3 1 1 11 1 1 11 0 0 0 0 10 1 5 smog
17 1440 3 1 1 11 1 1 11 0 0 0 11 10 1 50
18 1715 3 1 1 11 1 1 11 0 0 0 11 10 1 60 st.cirrus
19 1335 3 1 4 14 1 4 14 0 0 0 14 10 5 40 st.cirrus
20 1340 3 1 3 13 1 3 13 0 0 0 13 11 4 0 haze
21 1245 3 1 1 11 1 1 11 0 0 0 0 10 1 0 st.cirrus
22 1435 3 1 1 11 1 1 11 0 0 0 0 10 1 10 st.cirrus
23 1440 2 1 1 11 1 1 11 0 0 0 0 10 1 0 st.cirrus
24 1325 3 1 1 11 1 1 11 0 0 0 0 10 1 20 smog
25 1430 3 1 3 13 0 0 0 1 3 13 0 2 4 0
26 1345 3 1 4 14 0 0 0 1 4 14 0 25 5 0
27 1440 3 2 8 28 0 0 0 2 8 28 0 30 10 80
28 1705 3 2 10 30 0 0 0 2 10 30 0 30 12 90 st.cirrus
29 1500 3 3 17 47 1 1 11 2 16 36 36 44 19 0
30 1330 3 3 15 45 1 1 11 2 14 34 34 62 17 0
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Sunspots observation summary
Year: 2021
Month: June
OBSERVER: Igor Grágeda M.
Astronomia Sigma Octante
Monthly Mean R = 18.17
NR = 9.03 SR = 9.13 cR = 7.47
CV = 16.03 IS = 5.40
Q = 2.96 Cld = 27.50%
The Sun has been observed 28 days on 30 possible.
2 cloudy day 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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