Daily Sunspot Evaluation
Observation Sheet Friday, 9 September 1977
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)
- 4
- Number of spots (f)
- 9
- Relative number (R)
- 49
- Observer
- GA
- Reading
- all checks consistent
- File
- 19770909.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 20 | 36E | 243 | 33E | ||
| 2 | A – 1 | 17 | 73E | 206 | 70E | ||
| 3 | ? – 6 | 9 | 82E | 197 | 79E | ||
| 4 | J – 1 | 22 | 38W | 317 | 41W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.