Daily Sunspot Evaluation
Observation Sheet Saturday, 4 July 1981
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)
- 11
- Number of spots (f)
- 60
- Relative number (R)
- 170
- Observer
- SM
- Reading
- all checks consistent
- File
- 19810704.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 42 | 75W | 317 | 78W | - | |
| 2 | BXI – 7 | 21 | 55W | 297 | 58W | 25 | |
| 3 | HAX – 2 | 18 | 24W | 266 | 24W | 2 | |
| 4 | AXX – 1 | 20 | 15W | 257 | 18W | - | |
| 5 | BRI – 5 | 10 | 04W | 246 | 04W | 5 | |
| 6 | DAI – 14 | -6 | 52W | 294 | 55W | 105 | |
| 7 | EKI – 20 | -16 | 35W | 277 | 38W | 24 | |
| 8 | BXO – 2 | -9 | 40W | 282 | 43W | 25 | |
| 9 | BXO – 4 | -16 | 16W | 258 | 19W | 6 | |
| 10 | AXX – 1 | -26 | 19E | 223 | 16E | - | |
| 11 | AXX – 3 | -4 | 29E | 213 | 26E | 25 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.