Daily Sunspot Evaluation
Observation Sheet Saturday, 13 June 1981
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)
- 6
- Number of spots (f)
- 22
- Relative number (R)
- 82
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810613.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 6 | 11 | 14W | 17 ⚠ | 17W | 4 | |
| 2 | CAO – 4 | 7 | 61E | 79 ⚠ | 58E | 3 | |
| 3 | DRO – 3 | -25 | 09E | 151 ⚠ | 06E | 9 | |
| 4 | HAK – 3 | -23 | 28E | 132 ⚠ | 25E | 3.5 | |
| 5 | HKX – 3 | -26 | 48E | 112 ⚠ | 45E | 7 | |
| 6 | ? – 3 | -20 | 65E | 75 ⚠ | 62E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.