Daily Sunspot Evaluation
Observation Sheet Thursday, 11 May 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)
- 64
- Relative number (R)
- 134
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720511.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 7 | 31E | 30 | |||
| 2 | D – 8 | -7 | 53E | 8 | |||
| 3 | D – 14 | -16 | 32W | 93 | |||
| 4 | A – 1 | -24 | 49W | 108 | |||
| 5 | B – 5 | 6 | 30W | 91 | |||
| 6 | E – 30 | 17 | 30W | 91 | |||
| 7 | B – 3 | 14 | 21W | 82 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.