Daily Sunspot Evaluation
Observation Sheet Wednesday, 15 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)
- 10
- Number of spots (f)
- 31
- Relative number (R)
- 131
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680515.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 11 | 5E | 208 | |||
| 2 | A – 1 | 18 | 12E | 201 | |||
| 3 | A – 1 | -13 | 55E | 158 | |||
| 4 | ? – 2 | -32 | 76E | 137 | |||
| 5 | D – 8 | -30 | 45E | 168 | |||
| 6 | A – 2 | -31 | 33E | 180 | |||
| 7 | A – 1 | -30 | 36W | 249 | |||
| 8 | H – 2 | 16 | 72W | 285 | |||
| 9 | D – 11 | 13 | 18W | 231 | |||
| 10 | J – 2 | 26 | 30W | 243 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.