Daily Sunspot Evaluation
Observation Sheet Friday, 22 May 1981
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)
- 9
- Number of spots (f)
- 53
- Relative number (R)
- 143
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810522.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKO – 9 | 13 | 66W | 157 | 69W | 28 | |
| 2 | AXX – 1 | 12 | 06W | 97 | 09W | ||
| 3 | BXX – 10 | 17 | 43E | 48 | 40E | 5 | |
| 4 | AXX – 2 | 11 | 77E | 14 | 74E | ||
| 5 | HAX – 1 | -28 | 73W | 164 | 76W | 2 | |
| 6 | HAX – 4 | 2 | 72E | 19 | 69E | 3.5 | |
| 7 | HKI – 24 | -25 | 26W | 117 | 29W | 5.5 | |
| 8 | AXX – 1 | -12 | 47E | 44 | 44E | ||
| 9 | AXX – 1 | -9 | 56E | 35 | 52E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.