Daily Sunspot Evaluation
Observation Sheet Saturday, 10 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)
- 86
- Relative number (R)
- 146
- Observer
- TA
- Reading
- all checks consistent
- File
- 19990410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 6 | 10 | 28W | 305 | 31W | 6.5 | |
| 2 | AX – 1 | 15 | 15W | 292 | 18W | - | |
| 3 | DAC – 50 | 21 | 06W | 285 | 09W | 10 | |
| 4 | DSO – 6 | 7 | 16E | 261 | 13E | 2 | |
| 5 | DAO – 10 | -28 | 35E | 242 | 32E | 5 | |
| 6 | DRO – 13 | -19 | 42E | 234 | 40E | ~8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.