Daily Sunspot Evaluation
Observation Sheet Friday, 19 August 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)
- 17
- Relative number (R)
- 57
- Observer
- GA
- Reading
- all checks consistent
- File
- 19770819.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | 22 | 20E | 177 | 17E | ||
| 2 | A – 1 | -26 | 44E | 153 | 41E | ||
| 3 | D – 9 | 18 | 45W | 242 | 48W | ||
| 4 | D – 3 | 26 | 18W | 215 | 21W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.