Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 August 1997
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)
- 2
- Number of spots (f)
- 4
- Relative number (R)
- 24
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19970819.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 14 | 21W | 281 | 24W | 2 | 55 |
| 2 | AX – 2 | 27 | 08W | 268 | 11W | 42 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.