Daily Sunspot Evaluation
Observation Sheet Monday, 18 April 2005
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)
- 3
- Number of spots (f)
- 16
- Relative number (R)
- 46
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 20050418.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 11 | 2 | 05W | 44 | 07W | 06 | |
| 2 | HR – 3 | -8 | 07E | 32 | 05E | ≤1.5 | |
| 3 | HA – 2 | -11 | 7E | 328 ⚠ | 69E | ~2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.