Daily Sunspot Evaluation
Observation Sheet Saturday, 25 December 1971
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)
- 8
- Number of spots (f)
- 65
- Relative number (R)
- 145
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19711225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | -13 | 37E | 43 | |||
| 2 | B – 3 | -17 | 05E | 75 | |||
| 3 | B – 3 | -12 | 04W | 84 | |||
| 4 | A – 1 | -22 | 07W | 87 | |||
| 5 | E – 41 | -16 | 15W | 95 | |||
| 6 | G – 12 | -15 | 31W | 111 | |||
| 7 | A – 3 | -11 | 21W | 101 | |||
| 8 | J – 1 | -5 | 51W | 135 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.