Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 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)
- 8
- Number of spots (f)
- 31
- Relative number (R)
- 111
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20000418.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 2 | 11 | 63W | 83 | 65W | ||
| 2 | DAO – 2 | 34 | 02E | 18 | 00 | 3.5 | Ha2 |
| 3 | HS – 1 | 22 | 18E | 2 | 16E | ||
| 4 | DAC – 15 | 15 | 16E | 4 | 14E | ~4 | |
| 5 | HS – 1 | -14 | 39W | 59 | 41W | ||
| 6 | EKO – 7 | -22 | 11E | 9 | 09E | ||
| 7 | HR – 2 | -17 | 60E | 320 | 58E | ||
| 8 | HK – 1 | -13 | 75E | 305 | 73E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.