Daily Sunspot Evaluation
Observation Sheet Tuesday, 7 January 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)
- 13
- Relative number (R)
- 43
- Observer
- ED
- Reading
- all checks consistent
- File
- 19750107.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 4 | 5 | 06E | 197 | 03E | ||
| 2 | A – 2 | -8 | 45W | 248 | 48W | ||
| 3 | C – 7 | 10 | 41W | 244 | 46W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.