Daily Sunspot Evaluation
Observation Sheet Tuesday, 1 May 1990
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)
- 18
- Relative number (R)
- 78
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19900501.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSO – 7 | 13 | 28W | 213 | 31W | 4.5 | 179 |
| 2 | HS – 1 | 20 | 24E | 161 | 21E | 2 | 183 |
| 3 | BXO – 5 | -22 | 75W | 260 | 78W | 11 | 182 |
| 4 | BXO – 2 | -20 | 65W | 250 | 68W | 4 | 184 |
| 5 | HS – 1 | -6 | 34W | 219 | 37W | 2 | 180 |
| 6 | HA – 2 | -14 | 75E | 110 | 72E | 3 | 185 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.