Daily Sunspot Evaluation
Observation Sheet Tuesday, 16 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)
- 8
- Number of spots (f)
- 70
- Relative number (R)
- 150
- Observer
- SM
- Reading
- all checks consistent
- File
- 19810616.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 2 | 14 | 54W | 174 | 57W | ||
| 2 | DAI – 12 | 18 | 40W | 160 | 43W | 6.5 | |
| 3 | CAO – 11 | 8 | 21E | 99 | 18E | 8 | |
| 4 | BXI – 11 | -25 | 32W | 152 | 35W | 9 | |
| 5 | BXI – 6 | -22 | 11W | 131 | 14W | 6 | |
| 6 | DKO – 5 | -26 | 10E | 110 | 07E | 8 | |
| 7 | AXX – 1 | -30 | 20E | 100 | 17E | ||
| 8 | DKC – 22 | -20 | 26E | 94 | 23E | 9 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.