Daily Sunspot Evaluation
Observation Sheet Thursday, 19 April 2001
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)
- 5
- Number of spots (f)
- 25
- Relative number (R)
- 75
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20010419.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 2 | -119 | 14W | 244 | 17W | 4.5 | |
| 2 | HS – 2 | 8 | 05E | 225 | 02E | 2 | |
| 3 | DAO – 12 | 8 | 16E | 214 | 13E | 5.5 | |
| 4 | ? – 6 | 16 | 74E | 156 | 71E | ? | |
| 5 | HR – 3 | -9 | 26E | 204 | 23E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.