Daily Sunspot Evaluation
Observation Sheet Sunday, 4 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)
- 6
- Number of spots (f)
- 43
- Relative number (R)
- 103
- Observer
- HE
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 9 | 10 | 52W | 46 | 52W | 7 | |
| 2 | CAO – 9 | 20 | 69W | 63 | 69W | 7 | |
| 3 | AX – 1 | 11 | 70W | 64 | 70W | - | |
| 4 | DAI – 12 | -27 | 07E | 347 | 07E | 7 | |
| 5 | DRI – 11 | -29 | 04W | 358 | 04W | 4.5 | |
| 6 | AX – 1 | -35 | 07W | 61 ⚠ | 07W | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.