Daily Sunspot Evaluation
Observation Sheet Saturday, 17 May 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)
- 15
- Number of spots (f)
- 89
- Relative number (R)
- 239
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19800517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 40 | 46W | 341 | 49W | - | |
| 2 | AXX – 1 | 26 | 14E | 281 | 11E | - | |
| 3 | DAC – 29 | 15 | 29E | 246 ⚠ | 26E | 9E | |
| 4 | HSX – 1 | 9 | 58E | 237 | 55E | 1.5 | |
| 5 | ? – 1 | 25 | 80E | 215 | 77E | - | |
| 6 | AXX – 1 | -21 | 64W | 359 | 67W | - | |
| 7 | DKC – 15 | -16 | 54W | 351 | 59W | 7 | |
| 8 | HSX – 2 | -20 | 34W | 331 | 39W | 2 | |
| 9 | HSX – 1 | -20 | 20W | 315 | 23W | 2 | |
| 10 | HAX – 1 | -24 | 11W | 306 | 14W | 1 | |
| 11 | DKC – 12 | -8 | 06E | 289 | 03E | 7 | |
| 12 | AXX – 4 | -12 | 35E | 260 | 32E | 1.5 | |
| 13 | DKC – 18 | -13 | 44E | 251 | 41E | 10 | |
| 14 | HAX – 1 | -31 | 62E | 233 | 59E | 2 | |
| 15 | ? – 1 | -31 | 75E | 220 | 72E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.