Daily Sunspot Evaluation
Observation Sheet Thursday, 7 December 1989
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)
- 14
- Number of spots (f)
- 207
- Relative number (R)
- 347
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19891207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 6 | 22 | 78W | 13 | 80W | 5 | 478 |
| 2 | HA – 9 | 11 | 65W | 0 | 67W | 4 | 423 |
| 3 | BXI – 20 | 26 | 36W | 331 | 38W | 6 | 429 |
| 4 | DAC – 52 | 12 | 33W | 328 | 35W | 10 | 424 |
| 5 | HH – 4 | 18 | 10W | 305 | 12W | 4.5 | 426 |
| 6 | DKC – 39 | 18 | 15E | 280 | 13E | 6.5 | 426 |
| 7 | DAI – 17 | 13 | 51E | 244 | 49E | 8 | 472 |
| 8 | DKI – 16 | -10 | 70W | 5 | 72W | 9 | 471 |
| 9 | AX – 3 | -15 | 70W | 5 | 72W | 2 | 472 |
| 10 | HS – 2 | -16 | 43W | 338 | 45W | 2 | 472 |
| 11 | DAI – 15 | -10 | 40W | 335 | 42W | 5 | 472 |
| 12 | CSI – 16 | -16 | 17W | 312 | 19W | 7 | 472 |
| 13 | HA – 6 | -17 | 58E | 237 | 56E | 2 | 472 |
| 14 | HS – 2 | -8 | 78E | 217 | 76E | 3 | 472 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.