Daily Sunspot Evaluation
Observation Sheet Saturday, 21 August 1999
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)
- 24
- Relative number (R)
- 74
- Observer
- HE
- Reading
- all checks consistent
- File
- 19990821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 16 | 41W | 359 | 43W | - | Hr-2 |
| 2 | HK – 10 | 20 | 18W | 336 | 20W | 5 | |
| 3 | HK – 3 | -19 | 65E | 253 | 68E | ~4 | |
| 4 | FK – 8 | -25 | 70E | 248 | 68E | ~19 | |
| 5 | ? – 1 | -28 | 81E | 237 | 79E | ? |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.