Daily Sunspot Evaluation
Observation Sheet Thursday, 15 December 1983
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)
- 22
- Relative number (R)
- 62
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19831215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 6 | 2 | 46W | 335 ⚠ | 46W | 6 | 334 |
| 2 | CAI – 9 | -15 | 55W | 24 ⚠ | 55W | 9 | 332 |
| 3 | HAX – 2 | -46 | 29E | 290 | 29E | 4.5 | 337 |
| 4 | BXI – 5 | -34 | 58E | 261 | 58E | 5.5 | 339 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.