Daily Sunspot Evaluation
Observation Sheet Friday, 8 September 1972
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)
- 6
- Number of spots (f)
- 39
- Relative number (R)
- 99
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720908.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 18 | 15E | 259 | |||
| 2 | D – 12 | 20 | 36E | 238 | |||
| 3 | B – 6 | -5 | 29W | 303 | |||
| 4 | D – 13 | -8 | 48W | 322 | |||
| 5 | J – 1 | 17 | 79W | 353 | |||
| 6 | A – 2 | 18 | 53W | 327 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.