Daily Sunspot Evaluation
Observation Sheet Saturday, 12 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)
- 7
- Number of spots (f)
- 57
- Relative number (R)
- 127
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19980912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 8 | 42 | 61W | 226 | 63W | 08 | 208 202 |
| 2 | DAO – 6 | 15 | 37W | 202 | 39W | 10 | 202 200 |
| 3 | EAI – 24 | 26 | 11(E) | 154 | 09E | 12 | 204 203 |
| 4 | BXO – 7 | -23 | 40W | 205 | 42W | 45 | 209 208 |
| 5 | HA – 4 | -17 | 25W | 190 | 27W | 3 | 205 204 |
| 6 | CAO – 6 | -23 | 10E | 155 | 08E | 5 | 206 205 |
| 7 | ? – 2 | -22 | 35E | 90 ⚠ | 33E | ~ | 210 208 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.