Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 April 1992
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)
- 8
- Number of spots (f)
- 41
- Relative number (R)
- 121
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19920428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 6 | 9 | 46W | 34 ⚠ | 49W | 02 | 173 |
| 2 | CAO – 10 | 11 | 16W | 312 | 19W | 7 | 177 |
| 3 | CRO – 5 | 8 | 27E | 241 ⚠ | 22E | 4.5 | 178 |
| 4 | HS – 1 | -17 | 78W | 14 | 81W | 8 | 167 |
| 5 | HA – 3 | -20 | 54W | 350 | 57W | 2 | 169 |
| 6 | HA – 9 | -6 | 10E | 286 | 07E | 3.5 | 176 |
| 7 | AX – 4 | -8 | 28E | 268 | 25E | 2 | 181 |
| 8 | HA – 3 | -6 | 37E | 259 | 34E | 1 | 180 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.