Daily Sunspot Evaluation
Observation Sheet Monday, 18 December 2000
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)
- 10
- Number of spots (f)
- 56
- Relative number (R)
- 156
- Observer
- MB
- Reading
- all checks consistent
- File
- 20001218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 1 | 15 | 64W | 101 | 66W | no.5 | |
| 2 | DRI – 5 | 16 | 49W | 86 | 51W | 6 | |
| 3 | CSO – 5 | 7 | 48W | 85 | 50W | ~7.5 | |
| 4 | DRO – 9 | 13 | 03E | 34 | 01E | ~11 | |
| 5 | BXO – 4 | 20 | 40E | 357 | 38E | ~4 | |
| 6 | DAO – 8 | 9 | 60E | 337 | 58E | 9 | |
| 7 | ? – 4 | -14 | 77W | 114 | 79W | ~9 | |
| 8 | DAC – 17 | -25 | 27W | 64 | 29W | 12 | |
| 9 | HS – 1 | -18 | 18E | 19 | 16E | ~2 | |
| 10 | ? – 2 | -12 | 75E | 322 | 73E | ~7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.