Daily Sunspot Evaluation
Observation Sheet Monday, 19 October 1987
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)
- 40
- Relative number (R)
- 80
- Observer
- FL
- Reading
- all checks consistent
- File
- 19871019.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 12 | 22 | 46W | 195 | 48W | 10.5 | 78 |
| 2 | DKC – 15 | -25 | 61W | 210 | 63W | 10 | 81 |
| 3 | HKX – 2 | -31 | 34W | 183 | 36W | 3 | 80 |
| 4 | CAE – 11 | -33 | 54E | 95 | 52E | 9 | 82 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.