Daily Sunspot Evaluation
Observation Sheet Sunday, 7 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)
- 4
- Number of spots (f)
- 33
- Relative number (R)
- 73
- Observer
- HE
- Reading
- all checks consistent
- File
- 19970907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 8 | 21 | 04E | 4 | 02E | 7 | 21 |
| 2 | HR – 4 | 20 | 45E | 323 | 43E | 1.5 | 23 |
| 3 | OKI – 15 | -27 | 12E | 356 | 10E | 9 | 22 |
| 4 | ? – 6 | -26 | 76E | 292 | 74E | 24 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.