Daily Sunspot Evaluation
Observation Sheet Saturday, 13 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)
- 10
- Relative number (R)
- 40
- Observer
- GT
- Reading
- all checks consistent
- File
- 19770813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 32 | 62E | 214 | 60E | ||
| 2 | A – 4 | 28 | 65E | 211 | 63E | ||
| 3 | S – 4 | 23 | 53W | 329 | 55W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.