Daily Sunspot Evaluation
Observation Sheet Friday, 25 July 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)
- 31
- Relative number (R)
- 71
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19970725.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 20 | 18 | 49W | 279 | 52W | 8 | 52 |
| 2 | DRI – 6 | 28 | 26W | 256 | 29W | 8 | 50 |
| 3 | BXI – 4 | 22 | 43E | 187 | 40E | 4 | 51 |
| 4 | AX – 1 | 23 | 79E | 151 | 76E | 53 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.