Daily Sunspot Evaluation
Observation Sheet Monday, 13 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)
- 7
- Number of spots (f)
- 31
- Relative number (R)
- 101
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19980413.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAO – 3 | -23 | 69W | 84 | 72W | 12 | 67 |
| 2 | BXO – 2 | -27 | 72W | 87 | 75W | 6.5 | 66 |
| 3 | CAI – 6 | -22 | 38W | 53 | 41W | 7 | 65 |
| 4 | EHO – 5 | -19 | 21W | 36 | 24W | 12 | 64 |
| 5 | CRI – 9 | -25 | 08E | 7 | 05E | 4 | 63 |
| 6 | BXO – 5 | -25 | 16E | 359 | 13E | 5 | 62 |
| 7 | AX – 1 | -12 | 54E | 321 | 51E | 0.5 | 61 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.