Daily Sunspot Evaluation
Observation Sheet Thursday, 9 December 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)
- 28
- Relative number (R)
- 88
- Observer
- ıH
- Reading
- all checks consistent
- File
- 19991209.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 3 | 14 | 26W | 333 | 29W | ~3 | |
| 2 | DAI – 10 | 10 | 16E | 291 | 13E | ~6 | |
| 3 | HK – 1 | 13 | 67E | 240 | 64E | 4 | |
| 4 | HS – 1 | -14 | 47E | 260 | 44E | ~1 | |
| 5 | HA – 1 | -14 | 69E | 238 | 66E | 2 | |
| 6 | FK – 12 | 04W | 308 | 04W | 18.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.