Daily Sunspot Evaluation
Observation Sheet Friday, 21 January 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)
- 4
- Number of spots (f)
- 27
- Relative number (R)
- 67
- Observer
- MS
- Reading
- all checks consistent
- File
- 20050121.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKC – 10 | 13 | 74W | 181 | 77W | 12 | |
| 2 | HS – 1 | 6 | 32E | 75 | 29E | 2 | |
| 3 | DRI – 12 | -5 | 28W | 135 | 31W | ~4.5 | |
| 4 | DRO – 4 | -2 | 36E | 71 | 33E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.