Daily Sunspot Evaluation
Observation Sheet Friday, 21 October 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)
- 29
- Relative number (R)
- 59
- Observer
- GA
- Reading
- all checks consistent
- File
- 19771021.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 11 | -25 | 00 | 83 | 00W | ||
| 2 | ? – 2 | 19 | 79W | 162 | 78W | ||
| 3 | C – 16 | 20 | 65W | 148 | 65W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.