Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 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)
- 63
- Relative number (R)
- 123
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720509.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 7 | 57E | 31 | |||
| 2 | ? – 5 | -6 | 80E | 8 | |||
| 3 | E – 30 | -15 | 05W | 93 | |||
| 4 | B – 2 | -24 | 17W | 105 | |||
| 5 | A – 5 | 6 | 03W | 91 | |||
| 6 | D – 18 | 17 | 02W | 90 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.