Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 September 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)
- 5
- Number of spots (f)
- 41
- Relative number (R)
- 91
- Observer
- TA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19980915.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAO – 2 | 15 | 78W | 204 | 81W | 12 | 2300 |
| 2 | CRI – 25 | 26 | 96W | 152 ⚠ | 29W | 12.5 | 203 |
| 3 | HA – 1 | -17 | 65W | 191 | 68W | 1 | 204 |
| 4 | HA – 1 | -23 | 30W | 156 | 33W | 1 | 205 |
| 5 | DAO – 12 | -22 | 36E | 90 | 33E | 9.5 | 209 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.