Daily Sunspot Evaluation
Observation Sheet Wednesday, 15 September 1999
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)
- 74
- Relative number (R)
- 144
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19990915.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 19 | 15 | 38W | 25 | 41W | 11 | |
| 2 | HA – 2 | 12 | 19W | 7 | 22W | 1 | |
| 3 | EKO – 25 | 20 | 15W | 3 | 18W | 11.5 | |
| 4 | HS – 3 | 21 | 18E | 330 | 15E | 3.5 | C50-3 |
| 5 | HA – 5 | 11 | 49E | 299 | 46E | 3 | |
| 6 | DAC – 5 | 14 | 59E | 289 | 56E | 5 | ?1 |
| 7 | DSO – 15 | -26 | 18W | 6 | 21W | 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.