Daily Sunspot Evaluation
Observation Sheet Friday, 24 July 1987
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)
- 5
- Number of spots (f)
- 39
- Relative number (R)
- 89
- Observer
- FL
- Reading
- all checks consistent
- File
- 19870724.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 2 | 29 | 75E | 145 | 71E | 11 55 | 47 |
| 2 | DAC – 13 | -23 | 35E | 185 | 31E | 4.5 52 | 44 |
| 3 | BXI – 6 | -19 | 02W | 222 | 06W | 4.5 53 | 45 |
| 4 | DAC – 17 | -28 | 34W | 254 | 38W | 10 50 | 42 |
| 5 | HAX – 1 | -32 | 21W | 241 | 25W | 2 49 | 41 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.