Daily Sunspot Evaluation
Observation Sheet Sunday, 12 April 1998
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)
- 5
- Number of spots (f)
- 33
- Relative number (R)
- 83
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19980412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ESO – 7 | -23 | 55W | 83 | 57W | 11 | 6 x 60 |
| 2 | BYO – 4 | -27 | 58W | 86 | 60W | 07 | 6 x 64 |
| 3 | DSO – 6 | -23 | 04W | 52 ⚠ | 26W | 07 | 6 x 64 |
| 4 | EHO – 5 | -20 | 03W | 35 ⚠ | 09W | 12.5 | 6 x 64 |
| 5 | CRI – 11 | -30 | 19E | 9 | 17E | 06 | 6 x 65 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.