Daily Sunspot Evaluation
Observation Sheet Wednesday, 31 July 1985
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)
- 17
- Relative number (R)
- 47
- Observer
- HG
- Reading
- all checks consistent
- File
- 19850731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 14 | 6 | 24E | 18 | 21E | 9 | |
| 2 | AXX – 2 | 7 | 35E | 7 | 32E | -05 | |
| 3 | HKX – 1 | -14 | 39E | 3 | 36E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.