Daily Sunspot Evaluation
Observation Sheet Sunday, 17 October 2004
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)
- 41
- Relative number (R)
- 81
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20041017.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HK – 22 | -13 | 19E | 272 | 17E | 6 | 180 |
| 2 | CAI – 17 | -9 | 31E | 260 | 29E | 4 | 181 |
| 3 | HS – 1 | -19 | 66E | 225 | 64E | 1 | 182 |
| 4 | HA – 1 | -4 | 76E | 215 | 74E | 1 | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.