Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 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)
- 5
- Number of spots (f)
- 64
- Relative number (R)
- 114
- Observer
- FL
- Reading
- all checks consistent
- File
- 19880420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKO – 24 | 22 | 39W | 283 | 41W | 12 | 71 |
| 2 | HK – 4 | 24 | 18W | 262 | 20W | 3.5 | 74 |
| 3 | CAE – 30 | 25 | 04E | 240 | 02E | 8 | 75 |
| 4 | ? – 1 | -15 | 70W | 314 | 72W | 1 | 69 |
| 5 | AR – 5 | -14 | 07E | 237 | 05E | 2 | 79 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.