Daily Sunspot Evaluation
Observation Sheet Thursday, 21 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)
- 12
- Number of spots (f)
- 123
- Relative number (R)
- 243
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19800821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 13 | 83W | 188 | 84W | ||
| 2 | DAK – 12 | 11 | 58W | 163 | 61W | 7 | |
| 3 | DAO – 10 | 17 | 35W | 140 | 38W | 6 | |
| 4 | DAO – 13 | 10 | 25W | 130 | 28W | 11 | |
| 5 | DLF – 60 | 20 | 04W | 109 | 07W | 14.7 | |
| 6 | HAX – 10 | 15 | 35E | 70 | 32E | 2 | |
| 7 | HKX – 3 | 10 | 72E | 33 | 69E | 4 | |
| 8 | ARX – 1 | -27 | 58W | 163 | 61W | 1.5 | |
| 9 | HSX – 1 | -21 | 48W | 153 | 51W | 2 | |
| 10 | CAO – 9 | -8 | 43W | 148 | 46W | 9 | |
| 11 | AKK – 2 | -22 | 01W | 106 | 04W | ||
| 12 | AXX – 1 | -30 | 44E | 61 | 41E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.