Daily Sunspot Evaluation
Observation Sheet Sunday, 23 December 1973
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)
- 26
- Relative number (R)
- 66
- Observer
- HM
- Reading
- all checks consistent
- File
- 19731223.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 17 | -18 | 13W | 191 | 222 | ||
| 2 | B – 6 | -16 | 33W | 211 | 224 | ||
| 3 | A – 2 | -12 | 29W | 207 | 223 | ||
| 4 | J – 1 | 7 | 22W | 200 | 221 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.