Daily Sunspot Evaluation
Observation Sheet Sunday, 18 July 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)
- 36
- Relative number (R)
- 106
- Observer
- HE
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 5 | 18 | 67W | 115 | 69W | 10 | Dac-5 |
| 2 | DRO – 3 | 11 | 18W | 66 | 20W | 4 | |
| 3 | HA – 6 | 11 | 05W | 53 | 07W | 2.5 | |
| 4 | EAI – 8 | 19 | 71E | 333 ⚠ | 69E | 11 | Eki-8 |
| 5 | CAO – 4 | -18 | 67W | 115 | 69W | 7 | |
| 6 | CAO – 9 | -14 | 51W | 99 | 53W | 16 | Fao-9 |
| 7 | ? – 1 | -9 | 71E | 331 ⚠ | 75E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.