Daily Sunspot Evaluation
Observation Sheet Saturday, 20 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)
- 2
- Number of spots (f)
- 3
- Relative number (R)
- 23
- Observer
- TS
- Reading
- all checks consistent
- File
- 19870620.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARX – 1 | -20 | 11W | 318 | 42W | 0.5 | 36 |
| 2 | HAX – 2 | -31 | 29E | 278 | 28E | 4 | 35 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.