Daily Sunspot Evaluation
Observation Sheet Monday, 18 August 1980
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)
- 12
- Number of spots (f)
- 118
- Relative number (R)
- 238
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19800818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 5 | 4 | 45W | 190 | 48W | 7 | |
| 2 | CAI – 9 | 11 | 45W | 190 | 48W | 4 | |
| 3 | CSI – 22 | 13 | 15W | 160 | 18W | 9 | |
| 4 | DAO – 7 | 16 | 04E | 141 | 01E | 8 | |
| 5 | DAI – 21 | 10 | 17E | 128 | 14E | 8.5 | |
| 6 | EKI – 22 | 19 | 36E | 109 | 33E | 12 | |
| 7 | ? – 4 | 15 | 74E | 71 | 71E | 7 | |
| 8 | DSO – 11 | -26 | 17W | 162 | 20W | 6 | |
| 9 | HSI – 2 | -22 | 09W | 154 | 12W | 2 | |
| 10 | CSI – 12 | -8 | 01W | 146 | 04W | 7.5 | |
| 11 | HSI – 2 | -11 | 12E | 133 | 09E | 0.75 | |
| 12 | HRX – 1 | -11 | 23E | 122 | 20E | 0.75 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.