Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 May 1970
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)
- 10
- Number of spots (f)
- 55
- Relative number (R)
- 155
- Observer
- SM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19700512.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 9 | 21 | 46E | 297 ⚠ | |||
| 2 | J – 2 | 9 | 17E | 320 | |||
| 3 | ? – 6 | 17 | 78E | 259 | |||
| 4 | A – 4 | 2 | 49E | 288 | |||
| 5 | J – 1 | -8 | 57E | 280 | |||
| 6 | D – 19 | -10 | 34E | 303 | |||
| 7 | J – 1 | -12 | 63E | 274 | |||
| 8 | ? – 2 | -13 | 82W | 59 | |||
| 9 | H – 1 | 13 | 78W | 55 | |||
| 10 | G – 10 | 15 | 33W | 10 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.