Daily Sunspot Evaluation
Observation Sheet Thursday, 7 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)
- 5
- Number of spots (f)
- 30
- Relative number (R)
- 80
- Observer
- OG
- Reading
- all checks consistent
- File
- 19800807.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 7 | 19 | 21E | 269 | 18E | 7 | |
| 2 | HSX – 1 | 17 | 57E | 233 | 54E | 2 | |
| 3 | DAO – 18 | -4 | 02W | 292 | 05W | 6.5 | |
| 4 | AXX – 2 | -12 | 15E | 275 | 12E | 0.5 | |
| 5 | HAX – 2 | -26 | 53E | 237 | 50E | 2.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.