Daily Sunspot Evaluation
Observation Sheet Monday, 31 August 1987
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)
- 3
- Number of spots (f)
- 6
- Relative number (R)
- 36
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19870831.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXX – 3 | -16 | 28W | 105 | 31W | 2.20 | 62 |
| 2 | BXX – 2 | -24 | 28E | 49 | 25E | 1.569 | 61 |
| 3 | ? – 1 | -24 | 33E | 4 ⚠ | 70E | 2.71 | 63 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.