Daily Sunspot Evaluation
Observation Sheet Thursday, 4 September 1997
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)
- 15
- Relative number (R)
- 45
- Observer
- HE
- Reading
- all checks consistent
- File
- 19970904.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FAI – 6 | 29 | 63W | 109 | 63W | 17 | 41 |
| 2 | AX – 2 | 33 | 33E | 13 | 33E | 1 | 70 |
| 3 | DAO – 7 | -28 | 49E | 357 | 49E | 8 | 22 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.