Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 February 1973
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)
- 5
- Relative number (R)
- 35
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 11 | 54E | 16 | 20 | ||
| 2 | J – 3 | 7 | 55E | 15 | 22 | ||
| 3 | A – 1 | -8 | 04W | 74 | 43 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.