Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 12
- Number of spots (f)
- 53
- Relative number (R)
- 173
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 20001217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 15 | 53W | 104 | 56W | ||
| 2 | BXO – 3 | 21 | 37W | 88 | 40W | ~4 | |
| 3 | CRI – 7 | 16 | 36W | 87 | 39W | 6 | |
| 4 | CSI – 7 | 7 | 34W | 85 | 37W | 8.5 | |
| 5 | BXO – 2 | 12 | 12W | 63 | 15W | ~4 | |
| 6 | DAO – 9 | 14 | 17E | 34 | 14E | 9 | |
| 7 | HR – 1 | 19 | 53E | 358 | 50E | 1 | |
| 8 | ? – 3 | 9 | 78E | 333 | 75E | 8 | |
| 9 | DAO – 5 | -13 | 64W | 115 | 67W | 8.5 | |
| 10 | AX – 1 | -22 | 58W | 109 | 61W | ||
| 11 | DAC – 13 | -15 | 13W | 64 | 16W | ~10 | |
| 12 | HS – 1 | -18 | 32E | 19 | 29E | ~2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.