Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 October 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)
- 3
- Number of spots (f)
- 9
- Relative number (R)
- 39
- Observer
- HM
- Reading
- all checks consistent
- File
- 19731009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 0 | 21E | 67 | 195 | ||
| 2 | B – 6 | -9 | 61W | 149 | 194 | ||
| 3 | J – 1 | 12 | 78W | 167 | 198 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.