Daily Sunspot Evaluation
Observation Sheet Friday, 22 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)
- 43
- Relative number (R)
- 103
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720922.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 8 | 82E | 7 | |||
| 2 | E – 26 | -5 | 54E | 32 | |||
| 3 | J – 3 | -15 | 10E | 79 | |||
| 4 | A – 1 | -20 | 12E | 77 | |||
| 5 | A – 6 | -11 | 26W | 115 | |||
| 6 | B – 6 | 7 | 65W | 154 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.