Daily Sunspot Evaluation
Observation Sheet Saturday, 12 August 1972
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)
- 6
- Number of spots (f)
- 23
- Relative number (R)
- 83
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 18 | 21°E | 249 | |||
| 2 | A – 1 | 16 | 32°E | 238 | |||
| 3 | A – 3 | 13 | 61°E | 209 | |||
| 4 | J – 9 | -10 | 33°E | 237 | |||
| 5 | A – 1 | -9 | 23°W | 299 | |||
| 6 | G – 7 | 16 | 73°W | 343 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.