Daily Sunspot Evaluation
Observation Sheet Sunday, 10 April 1988
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)
- 7
- Number of spots (f)
- 48
- Relative number (R)
- 118
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19880410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 16 | 24 | 20W | 37 | 23W | 9 | 65 |
| 2 | EAO – 4 | 18 | 14W | 31 | 17W | 12.5 | 64 |
| 3 | FKF – 16 | 18 | 52E | 325 | 49E | 19 | 67 |
| 4 | HA – 2 | -31 | 28E | 349 | 25E | 2 | 66 |
| 5 | HS – 1 | -19 | 45E | 332 | 42E | 1.5 | 63 |
| 6 | BRI – 4 | -14 | 62E | 315 | 59E | 3.5 | 69 |
| 7 | AR – 5 | -19 | 67E | 310 | 64E | 3 | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.