Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 June 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)
- 30
- Relative number (R)
- 50
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20050621.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAO – 9 | -18 | 64W | 337 | 66W | 12 | |
| 2 | ORI – 21 | -8 | 20E | 253 | 18E | 4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.