Daily Sunspot Evaluation
Observation Sheet Monday, 20 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
- 19980720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 4 | 19 | 52W | 211 | 55W | 2 | 135 |
| 2 | DSI – 12 | -21 | 37W | 196 | 40W | 10 | 145 |
| 3 | CRI – 7 | -13 | 16W | 175 | 19W | 4 | 149 |
| 4 | BXI – 8 | -20 | 57E | 100 | 56E | 7.5 | 147 |
| 5 | BXO – 3 | -29 | 62E | 97 | 59E | 3.5 | 148 |
| 6 | EAO – 14 | -23 | 56W | 215 | 59W | 11.5 | 138 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.