Daily Sunspot Evaluation
Observation Sheet Sunday, 12 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)
- 5
- Number of spots (f)
- 63
- Relative number (R)
- 113
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19990912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 25 | 15 | 03E | 24 | 01E | 8 | |
| 2 | HS – 3 | 12 | 22E | 5 | 20E | 8 | |
| 3 | DAI – 21 | 21 | 25E | 2 | 23E | 7 | |
| 4 | HS – 1 | 19 | 58E | 329 | 56E | 11.5 | |
| 5 | FAI – 13 | -26 | 21E | 6 | 19E | 11.5 | 43 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.