Daily Sunspot Evaluation
Observation Sheet Wednesday, 16 April 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)
- 9
- Number of spots (f)
- 99
- Relative number (R)
- 189
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19800416.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 20 | 20 | 03E | 342 | 00 | 9 | |
| 2 | DSC – 21 | 14 | 07E | 338 | 04E | 10 | |
| 3 | HKX – 3 | -20 | 54W | 39 | 57W | 3 | |
| 4 | DKO – 5 | -29 | 38W | 23 | 41W | 7 | |
| 5 | EKC – 23 | -8 | 28W | 13 | 31W | 13.5 | |
| 6 | CAI – 8 | -31 | 23W | 8 | 26W | 3.5 | |
| 7 | CAO – 4 | -17 | 02E | 343 | 01W | 3.5 | |
| 8 | DAI – 14 | -27 | 07E | 338 | 04E | 4 | |
| 9 | ? – 1 | -14 | 77E | 268 | 74E | 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.