Daily Sunspot Evaluation
Observation Sheet Thursday, 25 June 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)
- 18
- Relative number (R)
- 48
- Observer
- HM
- Reading
- all checks consistent
- File
- 19870625.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 16 | 20 | 17W | 260 | 20W | 11.5 | 37 |
| 2 | ? – 1 | 28 | 80E | 163 | 77E | -45 | 38 |
| 3 | HSX – 1 | -31 | 11W | 254 | 14W | 1 | 35 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.