Daily Sunspot Evaluation
Observation Sheet Thursday, 19 August 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)
- 4
- Number of spots (f)
- 28
- Relative number (R)
- 68
- Observer
- ıH
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990819.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | -12 | 65W | 50 | 68W | 1 | |
| 2 | DAE – 14 | 15 | 08W | 353 | 11W | ~6 | |
| 3 | HH – 11 | 21 | 09E | 336 | 06E | 5 | HK-11 |
| 4 | AX – 2 | 24 | 13E | 328 ⚠ | 14E | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.