Daily Sunspot Evaluation
Observation Sheet Sunday, 9 May 1971
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)
- 33
- Relative number (R)
- 73
- Observer
- LT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19710509.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 6 | 6 | 43E | 189 ⚠ | |||
| 2 | ? – 2 | 4 | 80E | 158 | |||
| 3 | F – 24 | 13 | 32W | 270 | |||
| 4 | H – 1 | 11 | 15W | 253 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.