Daily Sunspot Evaluation
Observation Sheet Saturday, 15 July 1989
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)
- 57
- Relative number (R)
- 137
- Observer
- YK
- Reading
- all checks consistent
- File
- 19890715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXE – 3 | 22 | 52W | 102 | 56W | 2.75 | |
| 2 | HA – 4 | 11 | 24E | 26 | 20E | 2.25 | |
| 3 | EAE – 36 | 27 | 28E | 22 | 24E | 12 | |
| 4 | AX – 1 | 17 | 85E | 325 | 81E | - | |
| 5 | BXI – 4 | -11 | 51W | 101 | 55W | 15 | |
| 6 | AR – 2 | -13 | 35W | 85 | 39W | 0.5 | |
| 7 | HH – 5 | -18 | 26W | 76 | 30W | 3 | |
| 8 | AR – 2 | -6 | 57E | 353 | 53E | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.