Daily Sunspot Evaluation
Observation Sheet Thursday, 4 February 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)
- 7
- Number of spots (f)
- 20
- Relative number (R)
- 90
- Observer
- HG
- Reading
- all checks consistent
- File
- 19880204.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 2 | 59W | 224 | 60W | 10.5 | 22 | |
| 2 | CAO – 2 | 08W | 173 | 09W | 3.5 | 23 | |
| 3 | CSF – 8 | 21 | 10E | 155 | 09E | 4.5 | 24 |
| 4 | HAX – 3 | 28 | 31E | 134 | 30E | 3 | 25 |
| 5 | AXX – 2 | -18 | 29W | 194 | 30W | 2 | 26 |
| 6 | AXX – 2 | -22 | 40E | 125 | 39E | 0.5 | 27 |
| 7 | AXX – 1 | -28 | 74E | 91 | 73E | 1 | 28 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.