Daily Sunspot Evaluation
Observation Sheet Saturday, 20 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)
- 3
- Number of spots (f)
- 17
- Relative number (R)
- 47
- Observer
- FA
- Reading
- all checks consistent
- File
- 19770820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 5 | 23 | 06E | 179 | 04E | ||
| 2 | B – 9 | 19 | 59W | 242 | 61W | ||
| 3 | A – 3 | 27 | 31W | 214 | 33W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.