Daily Sunspot Evaluation
Observation Sheet Thursday, 10 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)
- 1
- Number of spots (f)
- 27
- Relative number (R)
- 37
- Observer
- FA
- Reading
- all checks consistent
- File
- 19770210.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 27 | -42 | 20E | 165 | 19E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.