Daily Sunspot Evaluation
Observation Sheet Friday, 21 May 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)
- 3
- Number of spots (f)
- 4
- Relative number (R)
- 34
- Observer
- HE
- Reading
- counts consistent, some coordinates doubtful
- File
- 19930521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 2 | 9 | 64W | 228 ⚠ | 66W | 0.5 | 118 |
| 2 | AX – 1 | 9 | 57W | 271 | 59W | - | 123 |
| 3 | HR – 1 | -18 | 60E | 154 | 58E | 0.5 | 126 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.