Daily Sunspot Evaluation
Observation Sheet Sunday, 18 October 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)
- 76
- Relative number (R)
- 146
- Observer
- YK
- Reading
- all checks consistent
- File
- 19981018.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 2 | 21 | 70W | 120 | 72W | 4.5 | 251 252 |
| 2 | ESI – 21 | 15 | 60W | 110 | 62W | 11 | 249 243 |
| 3 | CAO – 11 | 14 | 43W | 93 | 45W | 7.5 | 245 244 |
| 4 | DAO – 21 | 24 | 14E | 36 | 12E | 7.5 | 246 245 |
| 5 | CAO – 8 | 19 | 22E | 28 | 20E | 6.0 | 247 246 |
| 6 | HS – 2 | 19 | 42E | 8 | 40E | 1.0 | 248 247 |
| 7 | EHO – 11 | -21 | 57W | 107 | 59W | 11.5 | 249 248 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.