Daily Sunspot Evaluation
Observation Sheet Thursday, 12 August 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)
- 5
- Number of spots (f)
- 40
- Relative number (R)
- 90
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19990812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 22 | 79E | 358 | 76E | - | |
| 2 | HA – 1 | -31 | 47W | 124 | 50W | 2 | Hs-1 |
| 3 | HA – 2 | -13 | 17W | 94 | 20W | 2 | Hs-2 |
| 4 | EAC – 30 | -17 | 08W | 85 | 11W | 11 | Eki-30 |
| 5 | DAI – 4 | -22 | 59E | 18 | 56E | 6.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.