Daily Sunspot Evaluation
Observation Sheet Monday, 19 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)
- 40
- Relative number (R)
- 80
- Observer
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19770919.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 25 | 33E | 41 ⚠ | 30E | ||
| 2 | H – 13 | -23 | 50E | 57 ⚠ | 47E | ||
| 3 | F – 22 | 0 | 50W | 197 ⚠ | 53W | ||
| 4 | B – 3 | 16 | 60W | 207 ⚠ | 63W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.