Daily Sunspot Evaluation
Observation Sheet Sunday, 27 January 1991
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)
- 11
- Number of spots (f)
- 207
- Relative number (R)
- 317
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910127.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 3 | 22 | 66W | 272 | 69W | 2 | 35 |
| 2 | BXI – 6 | 25 | 12W | 218 | 15W | 7 | 43 |
| 3 | BRI – 18 | 8 | 05W | 211 | 08W | 8.5 | 38 |
| 4 | BXI – 18 | 12 | 18E | 188 | 15E | 5.5 | 45 |
| 5 | FKC – 78 | -18 | 04E | 202 | 01E | 18 | 41 |
| 6 | DKC – 46 | -10 | 10E | 196 | 07E | 11.5 | 42 |
| 7 | CAO – 12 | -13 | 24E | 182 | 21E | 7 | 46 |
| 8 | BXI – 6 | -11 | 35E | 171 | 32E | 4 | 49 |
| 9 | AR – 1 | -16 | 52E | 154 | 49E | 0.5 | 47 |
| 10 | FKO – 18 | -13 | 70E | 136 | 67E | 25 | 48 |
| 11 | ? – 1 | -18 | 83E | 123 | 80E | 2 | 50 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.