Daily Sunspot Evaluation
Observation Sheet Thursday, 20 February 2003
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)
- 3
- Number of spots (f)
- 21
- Relative number (R)
- 51
- Observer
- MS
- Reading
- all checks consistent
- File
- 20030220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DSO – 2 | 69 | 75W | 73 | 76W | ~11 | 41 |
| 2 | HS – 2 | 13 | 08E | 350 | 07E | ~65 | 40 |
| 3 | DAO – 17 | 17 | 26E | 332 | 25E | ~11 | 42 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.