Daily Sunspot Evaluation
Observation Sheet Monday, 18 May 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)
- 3
- Number of spots (f)
- 49
- Relative number (R)
- 79
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19980518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAO – 17 | 22 | 09W | 281 | 10W | 14 | 284 |
| 2 | ? – 10 | -22 | 75W | 347 | 36W | ? | 81 |
| 3 | ERI – 22 | -28 | 09W | 281 | 10W | 11 | 38 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.