Daily Sunspot Evaluation
Observation Sheet Sunday, 29 September 1974
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)
- 16
- Relative number (R)
- 56
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740929.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 8 | 60E | 21 | |||
| 2 | D – 9 | -7 | 66E | 15 | |||
| 3 | A – 1 | -15 | 52E | 29 | |||
| 4 | B – 4 | -11 | 30E | 51 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.