Daily Sunspot Evaluation
Observation Sheet Saturday, 21 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)
- 4
- Number of spots (f)
- 16
- Relative number (R)
- 56
- Observer
- TA
- Reading
- all checks consistent
- File
- 19930821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 6 | 9 | 68E | 9 | 65E | 6 | 216 |
| 2 | HA – 1 | -11 | 25W | 102 | 28W | 1.5 | 210 |
| 3 | AX – 1 | -9 | 25E | 52 | 22E | - | 217 |
| 4 | CAO – 8 | -9 | 33E | 44 | 30E | 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.