Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 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)
- 7
- Relative number (R)
- 37
- Observer
- FA
- Reading
- all checks consistent
- File
- 19770907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 21 | 63E | 243 | 61E | ||
| 2 | A – 2 | 16 | 40W | 346 | 42W | ||
| 3 | C – 4 | 23 | 10W | 316 | 12W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.