Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 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)
- 2
- Number of spots (f)
- 13
- Relative number (R)
- 33
- Observer
- FL
- Reading
- all checks consistent
- File
- 19871007.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 9 | 30 | 23W | 331 | 26W | 8 | 72 |
| 2 | CAE – 4 | 32 | 12E | 296 | 09E | 6 | 75 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.