Daily Sunspot Evaluation
Observation Sheet Tuesday, 7 September 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)
- 6
- Number of spots (f)
- 53
- Relative number (R)
- 113
- Observer
- AK0
- Reading
- all checks consistent
- File
- 19990907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXI – 14 | 12 | 67W | 160 | 69W | 6.5 | |
| 2 | BXI – 14 | 19 | 47W | 140 | 69W | 11 | |
| 3 | CSE – 4 | 20 | 23W | 116 | 25W | 5.5 | |
| 4 | HA – 10 | 13 | 69E | 24 | 67E | 2.5 | |
| 5 | CAI – 10 | -29 | 24W | 119 | 26W | 4 | |
| 6 | ? – 1 | -26 | 75E | 18 | 73E | ? |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.