Daily Sunspot Evaluation
Observation Sheet Saturday, 19 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)
- 6
- Relative number (R)
- 36
- Observer
- FA
- Reading
- all checks consistent
- File
- 19770219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 2 | -19 | 12E | 56 | 10E | ||
| 2 | ? – 3 | -42 | 85W | 153 | 87W | ||
| 3 | ? – 1 | 23 | 73W | 141 | 75W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.