Daily Sunspot Evaluation
Observation Sheet Friday, 17 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)
- 10
- Number of spots (f)
- 111
- Relative number (R)
- 211
- Observer
- TA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19920717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 4 | 7 | 55W | 13 | 58W | 4.5 | 275 |
| 2 | BXO – 6 | 9 | 02W | 320 | 05W | 6 | 268 |
| 3 | BXO – 4 | 15 | 02E | 316 | 01W | 3 | 284 |
| 4 | DAO – 14 | 23 | 06E | 312 | 06E | 7.5 | 270 |
| 5 | DAO – 4 | 15 | 54E | 259 ⚠ | 56E | 6 | 272 |
| 6 | HK – 4 | -12 | 74W | 32 | 77W | 4.5 | 261 E |
| 7 | FKI – 45 | -11 | 58W | 16 | 61W | 20 | 262 |
| 8 | CAO – 16 | -24 | 44W | 2 | 47W | 12 | 265 |
| 9 | CAO – 12 | -1 | 19W | 337 | 22W | 7 | 264 |
| 10 | BXO – 2 | -15 | 28E | 240 ⚠ | 25E | 4.5 | 271 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.