Daily Sunspot Evaluation
Observation Sheet Friday, 7 April 2000
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)
- 6
- Number of spots (f)
- 26
- Relative number (R)
- 86
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20000407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 21 | 67W | 233 | 69W | 3 | |
| 2 | HS – 2 | 21 | 32W | 198 | 34W | 3.5 | |
| 3 | HA – 2 | 6 | 00 | 166 | 02W | ~1.5 | |
| 4 | HA – 1 | -17 | 40W | 206 | 42W | ~2.5 | |
| 5 | DSC – 15 | -14 | 36E | 130 | 38E | 9 | |
| 6 | EAO – 4 | -19 | 66E | 100 | 64E | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.