Daily Sunspot Evaluation
Observation Sheet Thursday, 30 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)
- 4
- Number of spots (f)
- 26
- Relative number (R)
- 66
- Observer
- HM
- Reading
- all checks consistent
- File
- 19711230.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 22 | 43E | 331 | |||
| 2 | J – 1 | -4 | 45E | 329 | |||
| 3 | D – 17 | -8 | 15E | 359 | |||
| 4 | B – 6 | -14 | 40W | 54 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.