Daily Sunspot Evaluation
Observation Sheet Sunday, 20 July 1986
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)
- 7
- Relative number (R)
- 37
- Observer
- HG
- Reading
- all checks consistent
- File
- 19860720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARX – 1 | 8 | 09E | 39 | 08E | -0.7 | |
| 2 | BXO – 3 | 7 | 16E | 32 | 15E | 25 | |
| 3 | AXX – 3 | 8 | 60E | 348 | 59E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.