Daily Sunspot Evaluation
Observation Sheet Monday, 13 May 1968
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)
- 6
- Number of spots (f)
- 41
- Relative number (R)
- 101
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19680513.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 25 | 18 | 8E | 231 | |||
| 2 | J – 1 | -30 | 72E | 167 | |||
| 3 | B – 3 | -10 | 4E | 235 | |||
| 4 | D – 7 | 16 | 48W | 337 ⚠ | |||
| 5 | B – 3 | 22 | 71W | 310 | |||
| 6 | H – 2 | 25 | 7W | 246 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.