Daily Sunspot Evaluation
Observation Sheet Saturday, 13 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)
- 6
- Number of spots (f)
- 53
- Relative number (R)
- 113
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720513.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 10 | -5 | 67E | 328 | |||
| 2 | E – 23 | -9 | 26E | 9 | |||
| 3 | J – 1 | -9 | 75E | 320 | |||
| 4 | H – 4 | -15 | 60W | 95 | |||
| 5 | G – 12 | 17 | 58W | 93 | |||
| 6 | J – 3 | 13 | 48W | 83 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.