Daily Sunspot Evaluation
Observation Sheet Friday, 20 August 1993
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)
- 2
- Number of spots (f)
- 13
- Relative number (R)
- 33
- Observer
- MB
- Reading
- all checks consistent
- File
- 19930820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 3 | -10 | 13W | 103 | 16W | 2 | 210 |
| 2 | CAI – 10 | -9 | 44E | 43 | 44E | 9.5 | 215 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.