Daily Sunspot Evaluation
Observation Sheet Thursday, 9 May 1974
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)
- 7
- Number of spots (f)
- 46
- Relative number (R)
- 116
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740509.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | -24 | 03W | 173 | |||
| 2 | J – 3 | -13 | 03W | 173 | |||
| 3 | C – 25 | -12 | 20W | 190 | |||
| 4 | A – 2 | -9 | 10W | 180 | |||
| 5 | J – 10 | -6 | 37W | 207 | |||
| 6 | A – 2 | -4 | 54W | 224 | |||
| 7 | J – 1 | -2 | 57W | 227 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.