Daily Sunspot Evaluation
Observation Sheet Saturday, 18 July 1992
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)
- 8
- Number of spots (f)
- 62
- Relative number (R)
- 142
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19920718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CRO – 4 | 6 | 62W | 13 ⚠ | 72W | 06 | 275 |
| 2 | BAO – 7 | 8 | 15W | 819 ⚠ | 18W | 11 | 268 |
| 3 | AX – 2 | 15 | 13W | 317 | 16W | 05 | 274 |
| 4 | DAO – 13 | 23 | 07W | 311 | 10W | 09 | 270 |
| 5 | DAO – 5 | 15 | 45E | 259 | 42E | 6.5 | 272 |
| 6 | FKC – 19 | -11 | 74W | 15 | 74W | 18 | 262 |
| 7 | CAO – 7 | -24 | 58W | 2 | 61W | 10 | 265 |
| 8 | HA – 5 | -92 | 32W | 336 | 35W | 02 | 264 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.