Daily Sunspot Evaluation
Observation Sheet Monday, 7 September 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)
- 3
- Number of spots (f)
- 39
- Relative number (R)
- 69
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19870907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | -25 | 23W | 5 | 24W | 0.5 | 63 |
| 2 | DKI – 36 | -22 | 01E | 341 | 00 | 12.5 | 64 |
| 3 | ARX – 2 | -27 | 65E | 277 | 64E | 0.75 | 65 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.