Daily Sunspot Evaluation
Observation Sheet Friday, 16 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)
- 7
- Number of spots (f)
- 38
- Relative number (R)
- 108
- Observer
- TÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990416.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 1 | 9 | 05W | 207 ⚠ | 12W | 0.5 | HR-1 |
| 2 | AX – 1 | -28 | 48W | 246 | 51W | - | |
| 3 | AX – 2 | -18 | 37W | 235 | 40W | - | |
| 4 | BXO – 8 | -35 | 34W | 232 | 37W | 10 | CSO-8 |
| 5 | DRO – 16 | -19 | 22W | 220 | 25W | 5 | |
| 6 | CSO – 9 | -20 | 53E | 145 | 50E | 9 | |
| 7 | AX – 1 | -24 | 55E | 142 | 52E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.