Daily Sunspot Evaluation
Observation Sheet Tuesday, 7 April 1998
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)
- 46
- Relative number (R)
- 126
- Observer
- YK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19980407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CRO – 5 | 17 | 52W | 147 | 55W | 4.5 | 6568 |
| 2 | AX – 4 | 32 | 53E | 38 ⚠ | 54E | 2 | 6564 |
| 3 | HS – 2 | -21 | 54W | 146 | 54W | 1 | 6554 |
| 4 | AR – 3 | -27 | 06E | 89 | 03E | 4.5 | 6564 |
| 5 | ESI – 22 | -23 | 11E | 84 | 08E | 11 | 6560 |
| 6 | DSO – 5 | -20 | 58E | 37 | 55E | 10 | 6561 |
| 7 | CAO – 4 | -28 | 63E | 32 | 60E | 7.5 | 6562 |
| 8 | ? – 1 | -30 | 85E | 10 | 82E | ? | 6565 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.