Daily Sunspot Evaluation
Observation Sheet Saturday, 18 December 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)
- 7
- Relative number (R)
- 37
- Observer
- SG0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19931218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 3 | 0 | 45W | 352 | 47W | 2 | 287 |
| 2 | HA – 2 | 6 | 25W | 332 | 27W | 1 | 286 |
| 3 | HS – 2 | 1 | 34E | 213 ⚠ | 32E | 1.5 | 285 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.