Daily Sunspot Evaluation
Observation Sheet Thursday, 17 May 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)
- 7
- Number of spots (f)
- 93
- Relative number (R)
- 163
- Observer
- ıH
- Reading
- counts consistent, some coordinates doubtful
- File
- 20010517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 5 | 6 | 69W | 284 ⚠ | 67W | 10 | |
| 2 | EAC – 36 | 12 | 11W | 237 ⚠ | 14W | 13.5 | |
| 3 | DAC – 13 | 17 | 60E | 160 | 57E | 6 | |
| 4 | ? – 1 | 18 | 82E | 138 | 79E | ? | |
| 5 | ? – 1 | -22 | 83W | 303 | 86W | ? | |
| 6 | HA – 3 | -13 | 74W | 294 | 77W | 3.5 | |
| 7 | FAC – 34 | -19 | 55W | 275 | 58W | 18 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.