Daily Sunspot Evaluation
Observation Sheet Monday, 18 January 1988
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)
- 36
- Relative number (R)
- 76
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19880118.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | -35 | 09W | 39 | 11W | 2 | 10 |
| 2 | CAI – 20 | -38 | 03E | 27 | 01E | 9.75 | 11 |
| 3 | CKI – 12 | -20 | 22E | 8 | 20E | 12.75 | 12 |
| 4 | ARX – 1 | -31 | 46E | 344 | 44E | 0.5 | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.