Daily Sunspot Evaluation
Observation Sheet Thursday, 4 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)
- 2
- Number of spots (f)
- 17
- Relative number (R)
- 37
- Observer
- ED
- Reading
- counts consistent, some coordinates doubtful
- File
- 19720504.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 9 | 43E | 104 ⚠ | |||
| 2 | D – 16 | -16 | 61E | 62 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.