Daily Sunspot Evaluation
Observation Sheet Sunday, 11 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)
- 3
- Number of spots (f)
- 28
- Relative number (R)
- 58
- Observer
- HM
- Reading
- all checks consistent
- File
- 19770911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 17 | 50E | 204 | 47E | ||
| 2 | F – 22 | 9 | 59E | 195 | 56E | ||
| 3 | J – 1 | 22 | 63W | 317 | 66W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.