Daily Sunspot Evaluation
Observation Sheet Thursday, 28 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)
- 16
- Number of spots (f)
- 179
- Relative number (R)
- 339
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19891228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 20 | 80W | 98 | 82W | - | 432 |
| 2 | HA – 1 | 27 | 38W | 56 | 40W | 1.5 | 437 |
| 3 | BXO – 2 | 23 | 10W | 28 | 12W | 4.5 | 474 |
| 4 | BXI – 4 | 20 | 01W | 19 | 03W | 6 | 475 |
| 5 | AX – 3 | 25 | 00 | 18 | 02W | 1 | 476 |
| 6 | EKC – 52 | 24 | 11E | 7 | 09E | 13.5 | 477 |
| 7 | HK – 1 | 19 | 76E | 302 | 74E | 4 | 478 |
| 8 | ? – 8 | 14 | 79E | 299 | 77E | 13 | 479 |
| 9 | ? – 1 | -30 | 85W | 103 | 87W | - | 480 |
| 10 | EAI – 13 | -22 | 65W | 83 | 67W | 11 | 481 |
| 11 | AX – 1 | -3 | 20W | 38 | 22W | - | 482 |
| 12 | EKC – 43 | -26 | 10W | 28 | 12W | 14 | 483 |
| 13 | CAO – 7 | -10 | 02W | 20 | 04W | 4 | 484 |
| 14 | HA – 1 | -14 | 10E | 8 | 08E | 1 | 485 |
| 15 | CKE – 23 | -9 | 14E | 4 | 12E | 8 | 486 |
| 16 | DAI – 18 | -18 | 36E | 342 | 34E | 7 | 487 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.