Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 August 1980
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 15
- Number of spots (f)
- 121
- Relative number (R)
- 271
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19800820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 4 | 4 | 73W | 191 | 76W | 3.5 | |
| 2 | CAI – 5 | 12 | 70W | 188 | 73W | 7.5 | |
| 3 | CRI – 15 | 12 | 43W | 161 | 46W | 7.5 | |
| 4 | BXI – 11 | 17 | 23W | 141 | 26W | 8 | |
| 5 | DAO – 12 | 10 | 10W | 128 | 13W | 10 | |
| 6 | EKI – 31 | 19 | 09E | 109 | 06E | 15 | |
| 7 | CAI – 8 | 15 | 47E | 71 | 44E | 6 | |
| 8 | HAX – 1 | 10 | 84E | 34 | 81E | ? | |
| 9 | CAO – 5 | -30 | 67W | 185 | 70W | 7.5 | |
| 10 | CRO – 5 | -26 | 46W | 164 | 47W | 2 | |
| 11 | HAX – 1 | -22 | 35W | 153 | 38W | 2 | |
| 12 | CAI – 16 | -8 | 29W | 147 | 32W | 7.5 | |
| 13 | AXX – 3 | -10 | 15W | 133 | 18W | 1 | |
| 14 | AXX – 1 | -11 | 03W | 121 | 06W | - | |
| 15 | BXO – 3 | -22 | 12E | 106 | 09E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.