Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 July 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)
- 7
- Number of spots (f)
- 54
- Relative number (R)
- 124
- Observer
- SB0
- Reading
- all checks consistent
- File
- 19990721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 29 | 63W | 71 | 66W | ||
| 2 | HS – 1 | 11 | 57W | 65 | 60W | 1 | |
| 3 | HS – 4 | 10 | 45W | 53 | 48W | ~2 | |
| 4 | DAI – 11 | 37 | 28W | 36 | 31W | ~4.5 | |
| 5 | FAC – 34 | 20 | 35E | 333 | 32E | 18 | |
| 6 | HA – 1 | 16 | 69E | 299 | 66E | 2 | |
| 7 | ? – 2 | -18 | 72E | 296 | 69E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.