Daily Sunspot Evaluation
Observation Sheet Saturday, 16 August 1975
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
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19750816.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | -12 | 64E | 102 | 61E | ||
| 2 | A – 3 | -7 | 04W | 190 ⚠ | 07W | ||
| 3 | ? – 3 | 12 | 84W | 250 | 85W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.