Daily Sunspot Evaluation
Observation Sheet Tuesday, 6 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)
- 56
- Relative number (R)
- 116
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19990406.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 9 | 10 | 26E | 304 | 23E | 6 | CAI |
| 2 | CAI – 14 | 20 | 46E | 284 | 43E | 11 | CAI |
| 3 | DAO – 18 | -27 | 34W | 4 | 37W | 11 | DKO |
| 4 | CAI – 8 | -29 | 18W | 348 | 21W | 5 | HR-8 |
| 5 | AX – 2 | -34 | 62E | 268 | 59E | 2 | |
| 6 | DAO – 5 | -17 | 69E | 261 | 66E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.