Daily Sunspot Evaluation
Observation Sheet Friday, 17 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)
- 4
- Number of spots (f)
- 34
- Relative number (R)
- 74
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 8 | 31 | 31E | 285 | 29E | ||
| 2 | N – 7 | 21 | 56E | 260 | 54E | ||
| 3 | ? – 7 | 14 | 79W | 33 | 79W | ||
| 4 | D – 12 | 25 | 40W | 356 | 42W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.