Daily Sunspot Evaluation
Observation Sheet Saturday, 23 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)
- 4
- Number of spots (f)
- 57
- Relative number (R)
- 97
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 6 | 8 | 70E | 6 | |||
| 2 | E – 43 | -5 | 42E | 34 | |||
| 3 | J – 1 | -15 | 04W | 80 | |||
| 4 | B – 7 | -11 | 40W | 116 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.