Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 14
- Number of spots (f)
- 117
- Relative number (R)
- 257
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19800817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 18 | 77W | 235 | 80W | ||
| 2 | HAX – 5 | 12 | 32W | 170 ⚠ | 35W | 2.5 | |
| 3 | CKO – 6 | 5 | 31W | 189 | 34W | 8 | |
| 4 | BLF – 20 | 15 | 03W | 161 | 06W | 8 | |
| 5 | BXO – 2 | 7 | 03W | 161 | 06W | 3 | |
| 6 | DAI – 17 | 17 | 18E | 140 | 15E | 7 | |
| 7 | CAI – 14 | 11 | 30E | 128 | 27E | 5 | |
| 8 | EKI – 16 | 19 | 49E | 109 | 46E | 11.5 | |
| 9 | J – 1 | 15 | 86E | 72 | 83E | ||
| 10 | DAI – 14 | -25 | 06W | 164 | 09W | 10 | |
| 11 | DJO – 5 | -23 | 04E | 154 | 01E | 4 | |
| 12 | BXO – 13 | -8 | 12E | 146 | 04E | 7 | |
| 13 | HJF – 1 | -11 | 24E | 134 | 21E | 1 | |
| 14 | HJF – 2 | -12 | 34E | 122 | 33E | 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.