Daily Sunspot Evaluation
Observation Sheet Thursday, 28 July 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
- GA
- Reading
- all checks consistent
- File
- 19770728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 4 | -23 | 03W | 131 | 06W | ||
| 2 | D – 5 | 18 | 61W | 189 | 64W | ||
| 3 | J – 1 | 14 | 17W | 145 | 20W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.