Daily Sunspot Evaluation
Observation Sheet Saturday, 12 February 1977
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)
- 43
- Relative number (R)
- 73
- Observer
- GA
- Reading
- all checks consistent
- File
- 19770212.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 10 | 22 | 22E | 137 | 21E | ||
| 2 | E – 31 | -42 | 01W | 160 | 02W | ||
| 3 | A – 2 | 15 | 37W | 196 | 38W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.