Daily Sunspot Evaluation
Observation Sheet Friday, 25 August 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)
- 7
- Number of spots (f)
- 57
- Relative number (R)
- 127
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720825.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 4 | -8 | 65E | 33 | |||
| 2 | J – 6 | -19 | 35E | 63 | |||
| 3 | H – 17 | -15 | 21E | 77 | |||
| 4 | A – 2 | -21 | 16W | 114 | |||
| 5 | B – 15 | -4 | 12W | 110 | |||
| 6 | A – 2 | -25 | 65W | 163 | |||
| 7 | G – 11 | 10 | 14W | 112 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.