Daily Sunspot Evaluation
Observation Sheet Thursday, 18 June 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)
- 24
- Relative number (R)
- 74
- Observer
- HE
- Reading
- all checks consistent
- File
- 19980618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 10 | -25 | 26W | 248 | 28W | 8 | 115 103 |
| 2 | CSO – 8 | 17 | 11E | 211 | 01E | 7.5 | 106 204 |
| 3 | HR – 3 | -23 | 15W | 237 | 17W | 4.5 | 107 101 |
| 4 | AX – 2 | -25 | 00 | 222 | 02W | 1 | 113 211 |
| 5 | HS – 1 | -28 | 45E | 177 | 42E | 2 | 112 240 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.