Daily Sunspot Evaluation
Observation Sheet Saturday, 18 January 1992
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)
- 6
- Number of spots (f)
- 19
- Relative number (R)
- 79
- Observer
- HE
- Reading
- all checks consistent
- File
- 19920118.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 1 | 13 | 04E | 183 | 02E | 1 | 21 |
| 2 | ? – 1 | 2 | 81E | 106 | 79E | 2 | 31 |
| 3 | CRO – 4 | -5 | 64W | 251 | 66W | 10 | 16 |
| 4 | DSO – 4 | -10 | 08W | 195 | 10W | 7 | 22 |
| 5 | BXO – 8 | -11 | 40E | 147 | 38E | 6 | 23 |
| 6 | ? – 1 | -15 | 82E | 105 | 80E | 2 | 30 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.