Daily Sunspot Evaluation
Observation Sheet Friday, 28 September 2001
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)
- 12
- Number of spots (f)
- 103
- Relative number (R)
- 223
- Observer
- HE
- Reading
- all checks consistent
- File
- 20010928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 19 | 78W | 326 | 80W | 3 | |
| 2 | HS – 1 | 2 | 73W | 321 | 75W | 2 | |
| 3 | DAO – 6 | 24 | 43W | 291 | 45W | 6 | |
| 4 | HS – 2 | 21 | 07E | 241 | 05E | 2 | |
| 5 | DAO – 10 | 12 | 08E | 240 | 06E | 3.5 | |
| 6 | DAO – 5 | 3 | 16E | 232 | 14E | 8 | |
| 7 | ESC – 20 | 13 | 23E | 225 | 21E | 17 | |
| 8 | HR – 2 | 10 | 64E | 184 | 62E | 1 | |
| 9 | EKC – 31 | -20 | 40W | 288 | 42W | 18 | |
| 10 | HK – 11 | -19 | 25W | 273 | 24W | 5 | |
| 11 | DAI – 13 | -14 | 28E | 220 | 26E | 6 | |
| 12 | HS – 1 | -14 | 70E | 178 | 68E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.