Daily Sunspot Evaluation
Observation Sheet Thursday, 17 July 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)
- 9
- Number of spots (f)
- 56
- Relative number (R)
- 146
- Observer
- MS
- Reading
- all checks consistent
- File
- 20030717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 2 | 13 | 21W | 239 | 24W | 3 | 195 |
| 2 | DAI – 8 | 16 | 14E | 204 | 11E | 3 | 196 |
| 3 | EAI – 21 | 14 | 27E | 191 | 24E | 12.5 | 198 |
| 4 | HS – 1 | 17 | 44E | 174 | 41E | 0.5 | 200 |
| 5 | HS – 1 | 13 | 48E | 170 | 45E | ~2 | 201 |
| 6 | HA – 1 | -9 | 78W | 296 | 81W | ~0.5 | 187 |
| 7 | HS – 2 | -10 | 07W | 225 | 10W | ~1.5 | 191 |
| 8 | DAC – 19 | -12 | 22E | 196 | 19E | ~8 | 197 |
| 9 | HH – 1 | -3 | 79E | 139 | 76E | ~3 | 202 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.