Daily Sunspot Evaluation
Observation Sheet Sunday, 12 February 1978
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)
- 7
- Number of spots (f)
- 73
- Relative number (R)
- 143
- Observer
- HM
- Reading
- all checks consistent
- File
- 19780212.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | -22 | 32E | 350 | 31E | ||
| 2 | B – 2 | -29 | 23E | 359 | 22E | ||
| 3 | C – 7 | -28 | 09W | 31 | 10W | ||
| 4 | A – 1 | -32 | 61W | 83 | 62W | ||
| 5 | C – 13 | 17 | 52W | 74 | 53W | ||
| 6 | C – 12 | 24 | 54W | 76 | 56W | ||
| 7 | F – 34 | 15 | 10W | 32 | 11W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.