Daily Sunspot Evaluation
Observation Sheet Friday, 11 July 1975
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)
- 24
- Relative number (R)
- 44
- Observer
- GA
- Reading
- all checks consistent
- File
- 19750711.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | -11 | 67E | 215 | 64E | ||
| 2 | A – 21 | 5 | 17W | 299 | 20W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.