Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 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)
- 39
- Relative number (R)
- 79
- Observer
- SB0
- Reading
- all checks consistent
- File
- 19990428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 11 | 31 | 01W | 38 | 01W | 5 | |
| 2 | EKC – 22 | 21 | 06E | 31 | 06E | 13 | |
| 3 | CAO – 5 | 16 | 06E | 31 | 06E | 6 | |
| 4 | HA – 1 | -14 | 69W | 106 | 69W | 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.