Daily Sunspot Evaluation
Observation Sheet Saturday, 9 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)
- 9
- Number of spots (f)
- 48
- Relative number (R)
- 138
- Observer
- HG
- Reading
- all checks consistent
- File
- 19880409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CKE – 12 | 25 | 08W | 37 | 09W | 10 | 65 |
| 2 | EKC – 11 | 18 | 03W | 33 | 04W | 15 | 64 |
| 3 | FKF – 16 | 18 | 63E | 326 | 62E | 17 | 67 |
| 4 | HA – 1 | -20 | 78W | 107 | 79W | 2 | 59 |
| 5 | CAO – 4 | -30 | 42E | 347 | 41E | 9 | 66 |
| 6 | AX – 1 | -26 | 54E | 335 | 53E | 70 | |
| 7 | HA – 1 | -19 | 57E | 332 | 56E | 15 | 68 |
| 8 | HA – 1 | -14 | 72E | 317 | 71E | 2 | 69 |
| 9 | HA – 1 | -18 | 77E | 312 | 76E | 25 | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.