Daily Sunspot Evaluation
Observation Sheet Friday, 15 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)
- 4
- Number of spots (f)
- 10
- Relative number (R)
- 50
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19970815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 14 | 32E | 281 | 29E | 2 | 59 |
| 2 | CAO – 4 | 26 | 36E | 277 | 33E | 5 | 60 |
| 3 | AX – 2 | 27 | 55E | 258 | 52E | 0.5 | 61 |
| 4 | AXO – 3 | -21 | 73W | 26 | 76W | 8 | 57 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.