Daily Sunspot Evaluation
Observation Sheet Monday, 19 September 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)
- 10
- Number of spots (f)
- 55
- Relative number (R)
- 155
- Observer
- HE
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880919.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAC – 16 | 20 | 65W | 100 | 67W | 14 | 243 |
| 2 | BAC – 9 | 20 | 04E | 31 | 02E | 9.5 | 231 |
| 3 | ? – 2 | 30 | 80E | 715 ⚠ | 78E | 2 | 237 |
| 4 | AX – 1 | -30 | 69W | 104 | 71W | 233 | |
| 5 | AX – 1 | -18 | 31W | 66 | 33W | 234 | |
| 6 | CHE – 7 | -12 | 29W | 60 ⚠ | 27W | 6.9 | 223 |
| 7 | HS – 6 | -15 | 42E | 153 ⚠ | 40E | 6 | 230 |
| 8 | HA – 4 | -36 | 49E | 146 ⚠ | 47E | 3 | 232 |
| 9 | AX – 2 | -20 | 52E | 343 | 50E | 235 | |
| 10 | CAC – 7 | -36 | 59E | 136 ⚠ | 57E | 8.9 | 236 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.