Daily Sunspot Evaluation
Observation Sheet Sunday, 25 April 1999
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
- HE
- Reading
- all checks consistent
- File
- 19990425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 3 | 31 | 38E | 42 | 34E | 3 | |
| 2 | DAO – 5 | 21 | 49E | 31 | 45E | 4 | |
| 3 | DAO – 4 | 16 | 49E | 31 | 45E | 5 | |
| 4 | HA – 5 | -14 | 28W | 108 | 32W | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.