Daily Sunspot Evaluation
Observation Sheet Monday, 9 October 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)
- 9
- Relative number (R)
- 49
- Observer
- HM
- Reading
- all checks consistent
- File
- 19721009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | -6 | 32W | 255 | |||
| 2 | A – 1 | -8 | 53W | 276 | |||
| 3 | J – 1 | 18 | 50W | 273 | |||
| 4 | A – 1 | 18 | 40W | 263 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.