Daily Sunspot Evaluation
Observation Sheet Sunday, 28 January 1990
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)
- 122
- Relative number (R)
- 262
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19900128.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 4 | 13 | 61W | 32 | 64W | 6 | 46 |
| 2 | AX – 1 | 26 | 60W | 31 | 63W | - | 51 |
| 3 | BXI – 13 | 13 | 24W | 355 | 27W | 7 | 47 |
| 4 | AR – 1 | 40 | 23W | 354 | 26W | - | 54 |
| 5 | EAI – 16 | 23 | 06E | 325 | 03E | 12 | 48 |
| 6 | HH – 2 | 10 | 24E | 307 | 21E | 3.5 | 43 |
| 7 | BXI – 8 | 14 | 33E | 298 | 30E | 6 | 55 |
| 8 | BXI – 6 | 28 | 48E | 283 | 45E | 6 | 52 |
| 9 | HK – 1 | 24 | 70E | 261 | 67E | 4 | 53 |
| 10 | ? – 3 | -11 | 80W | 51 | 83W | 9 | 30 |
| 11 | AX – 2 | -13 | 61W | 32 | 64W | 3 | 37 |
| 12 | CAO – 8 | -27 | 55W | 26 | 58W | 7 | 31 |
| 13 | FKC – 47 | -11 | 08W | 338 | 10W | 20 | 41 |
| 14 | CAI – 10 | -16 | 15E | 316 | 12E | 6 | 50 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.