Daily Sunspot Evaluation
Observation Sheet Friday, 28 April 1978
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)
- 6
- Number of spots (f)
- 60
- Relative number (R)
- 120
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 33 | 24 | 40E | 75 | 37E | ||
| 2 | D – 13 | 24 | 63E | 52 | 69E | ||
| 3 | ? – 1 | -31 | 82W | 197 | 85W | ||
| 4 | D – 5 | 14 | 71W | 186 | 74W | ||
| 5 | C – 4 | 20 | 74W | 189 | 77W | ||
| 6 | C – 4 | 29 | 20W | 135 | 23W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.