Daily Sunspot Evaluation
Observation Sheet Saturday, 28 July 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)
- 30
- Relative number (R)
- 100
- Observer
- MB
- Reading
- all checks consistent
- File
- 20010728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 17 | 75W | 62 | 77W | ~2 | |
| 2 | DRO – 14 | 13 | 23W | 10 | 25W | 8 | |
| 3 | ? – 1 | -24 | 85W | 72 | 87W | ? | |
| 4 | DRO – 6 | -24 | 08E | 339 | 06E | ~5.5 | |
| 5 | AX – 1 | -9 | 08E | 339 | 06E | - | |
| 6 | HS – 2 | -19 | 53E | 294 | 51E | ~2 | |
| 7 | CRO – 5 | -22 | 64E | 283 | 62E | ~4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.