Daily Sunspot Evaluation
Observation Sheet Saturday, 13 August 2005
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)
- 2
- Number of spots (f)
- 11
- Relative number (R)
- 31
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20050813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 1 | 12 | 84W | 16 | 87W | -0.5 | |
| 2 | DAI – 10 | -13 | 38E | 254 | 35E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.