Daily Sunspot Evaluation
Observation Sheet Monday, 28 September 1998
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)
- 37
- Relative number (R)
- 157
- Observer
- HE
- Reading
- counts consistent, some coordinates doubtful
- File
- 19980928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 2 | 17 | 81W | 34 | 83W | 8 | 218 312 |
| 2 | NS – 1 | 32 | 64W | 17 | 66W | 1 | 219 313 |
| 3 | HA – 5 | 20 | 61W | 14 | 63W | 6 | 215 216 |
| 4 | AX – 2 | 13 | 23W | 336 | 05W | 1.5 | 222 326 |
| 5 | ? – 1 | 15 | 85E | 228 | 83E | - | 228 322 |
| 6 | HA – 2 | -23 | 54W | 7 | 56W | 2 | 220 213 |
| 7 | HR – 1 | -14 | 44W | 357 | 46W | - | 223 224 |
| 8 | AX – 1 | -23 | 39W | 352 | 41W | - | 225 218 |
| 9 | CEO – 10 | -12 | 12W | 325 | 14W | 3 | 221 225 |
| 10 | FAO – 10 | -29 | 05W | 318 | 07W | 11.5 | 223 222 |
| 11 | AX – 1 | -31 | 02E | 311 | 00 | - | 227 223 |
| 12 | ? – 1 | -28 | 93E | 240 ⚠ | 91E | - | 228 219 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.