Daily Sunspot Evaluation
Observation Sheet Friday, 12 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)
- 65
- Relative number (R)
- 125
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720512.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 6 | 18E | 30 | |||
| 2 | ? – 7 | -5 | 79E | 329 | |||
| 3 | D – 17 | -7 | 40E | 8 | |||
| 4 | C – 15 | -16 | 45W | 93 | |||
| 5 | E – 22 | 17 | 45W | 93 | |||
| 6 | J – 2 | 13 | 35W | 83 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.