Daily Sunspot Evaluation
Observation Sheet Monday, 17 December 1984
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)
- 6
- Relative number (R)
- 26
- Observer
- TS
- Reading
- all checks consistent
- File
- 19841217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 4 | 17 | 03W | 148 | 06W | 4.5 | 195 |
| 2 | ? – 2 | -11 | 80W | 225 | 83W | 8 | 194 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.