Daily Sunspot Evaluation
Observation Sheet Monday, 20 April 1998
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)
- 2
- Number of spots (f)
- 27
- Relative number (R)
- 47
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19980420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CRI – 25 | 21 | 30W | 312 | 32W | 10.5 | |
| 2 | AX – 2 | 24 | 33E | 245 | 35E | 0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.