Daily Sunspot Evaluation
Observation Sheet Monday, 19 April 1999
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)
- 4
- Number of spots (f)
- 21
- Relative number (R)
- 61
- Observer
- ıH
- Reading
- all checks consistent
- File
- 19990419.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 7 | 21 | 54W | 213 | 57W | 28 | |
| 2 | DSO – 4 | 18 | 22E | 137 | 19E | 4 | |
| 3 | HS – 3 | -21 | 11E | 148 | 08E | 1.5 | |
| 4 | CAO – 7 | -15 | 51E | 108 | 48E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.