Daily Sunspot Evaluation
Observation Sheet Monday, 13 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)
- 2
- Number of spots (f)
- 5
- Relative number (R)
- 25
- Observer
- MB
- Reading
- all checks consistent
- File
- 19931213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -10 | 79°W | 91 | 81W | - | 298 |
| 2 | BXO – 4 | -19 | 73W | 85 | 75W | 4° | 297 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.