Daily Sunspot Evaluation
Observation Sheet Saturday, 19 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)
- 7
- Number of spots (f)
- 67
- Relative number (R)
- 137
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910119.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKO – 10 | 15 | 69W | 20 | 71W | 21 | 22 |
| 2 | BRO – 3 | 28 | 18W | 329 | 20W | 7 | 32 |
| 3 | DKI – 12 | 21 | 35E | 276 | 33E | 9 | 35 |
| 4 | AX – 1 | -22 | 48W | 359 | 50W | 0.5 | 33 |
| 5 | CAI – 17 | -7 | 42W | 353 | 44W | 9 | 27 |
| 6 | DKC – 19 | -13 | 25W | 336 | 27W | 11.5 | 36 |
| 7 | BXI – 5 | -28 | 29E | 282 | 27E | 4 | 37 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.