Daily Sunspot Evaluation
Observation Sheet Sunday, 20 April 2003
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)
- 22
- Relative number (R)
- 72
- Observer
- HE
- Reading
- all checks consistent
- File
- 20030420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 4 | 16 | 37W | 338 | 38W | 2 | 91 |
| 2 | DAO – 7 | 17 | 17E | 284 | 16E | 3 | 92 |
| 3 | HS – 2 | 11 | 44E | 257 | 43E | 2.5 | 93 |
| 4 | HA – 1 | -7 | 56W | 357 | 57W | 1 | 89 |
| 5 | HK – 8 | -15 | 62E | 239 | 61E | 7 | 94 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.