Daily Sunspot Evaluation
Observation Sheet Friday, 16 September 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)
- 48
- Relative number (R)
- 78
- Observer
- GA
- Reading
- all checks consistent
- File
- 19770916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 26 | 75E | 112 | 72E | ||
| 2 | E – 41 | 8 | 10W | 197 | 13W | ||
| 3 | G – 5 | 15 | 19W | 206 | 22W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.