Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 June 1990
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)
- 31
- Relative number (R)
- 101
- Observer
- YK
- Reading
- all checks consistent
- File
- 19900619.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 17 | 61W | 318 | 65W | 1 | 259 |
| 2 | BXO – 3 | 29 | 61W | 318 | 65W | 8.5 | 254 |
| 3 | BRI – 14 | 8 | 24W | 281 | 28W | 8.5 | 252 |
| 4 | AX – 1 | 14 | 23W | 280 | 27W | 255 | |
| 5 | HH – 1 | -15 | 58W | 315 | 62W | 2 | 241 |
| 6 | CAO – 9 | -31 | 24W | 281 | 28W | 13.5 | 250 |
| 7 | HS – 1 | -10 | 02W | 259 | 06W | 2.5 | 253 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.