Daily Sunspot Evaluation
Observation Sheet Thursday, 28 January 1988
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)
- 4
- Number of spots (f)
- 19
- Relative number (R)
- 59
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880128.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 9 | 20 | 67W | 325 | 68W | 12 | 18 |
| 2 | ARX – 2 | -15 | 47W | 300 ⚠ | 43W | 2.5 | 21 |
| 3 | DAI – 7 | -30 | 05W | 263 | 06W | 6.5 | 17 |
| 4 | AXX – 1 | -25 | 01E | 257 | 19 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.