Daily Sunspot Evaluation
Observation Sheet Tuesday, 27 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)
- 30
- Relative number (R)
- 70
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19990427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 11 | 30 | 14E | 39 | 11E | 8 | |
| 2 | BAI – 15 | 21 | 20E | 33 | 17E | 11 | |
| 3 | CSO – 2 | 16 | 21E | 32 | 18E | 7 | |
| 4 | HS – 2 | -13 | 56W | 109 | 59W | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.