Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 July 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)
- 6
- Number of spots (f)
- 48
- Relative number (R)
- 108
- Observer
- NA
- Reading
- all checks consistent
- File
- 19980728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 4 | 24 | 54W | 107 | 57W | 4.5 | 150 |
| 2 | CRO – 10 | 23 | 29W | 82 | 32W | 5.0 | 158 |
| 3 | DHC – 17 | 31 | 01E | 52 | 02W | 6.0 | 153 |
| 4 | HS – 1 | 26 | 65E | 348 | 62E | 2.0 | 156 |
| 5 | AX – 3 | 15 | 07W | 60 | 10W | 0.5 | 152 |
| 6 | EHI – 13 | -23 | 02W | 55 | 09W | 10.5 | 151 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.