Daily Sunspot Evaluation
Observation Sheet Thursday, 28 August 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)
- 36
- Relative number (R)
- 66
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19970828.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 4 | 9 | 21E | 120 | 18E | 1.5 | 64 |
| 2 | AX – 4 | 20 | 30E | 111 | 27E | 2.5 | 67 |
| 3 | CAE – 28 | 28 | 35E | 106 | 52E | 11 | 63 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.