Daily Sunspot Evaluation
Observation Sheet Friday, 9 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)
- 8
- Number of spots (f)
- 57
- Relative number (R)
- 137
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19990409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 6 | 10 | 15W | 305 | 18W | 7 | |
| 2 | DAC – 27 | 21 | 07E | 283 | 04E | ~9 | |
| 3 | AX – 4 | 14 | 16E | 274 | 13E | ~2 | |
| 4 | HH – 3 | -28 | 77W | 7 | 80W | ~3 | |
| 5 | AX – 1 | -36 | 21E | 269 | 18E | ||
| 6 | DSO – 5 | -17 | 30E | 260 | 27E | 8 | |
| 7 | DRO – 10 | -28 | 50E | 240 | 47E | 5 | |
| 8 | AX – 1 | -18 | 57E | 233 | 54E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.