Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 July 1993
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)
- 31
- Relative number (R)
- 91
- Observer
- TA
- Reading
- all checks consistent
- File
- 19930720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 5 | 6 | 57W | 195 | 58W | 6 | 185 |
| 2 | HA – 3 | 9 | 20E | 118 | 19E | 4 | 186 |
| 3 | CRO – 8 | -18 | 46W | 184 | 47W | 7 | 189 |
| 4 | HS – 1 | -12 | 31E | 107 | 30E | 2.5 | 187 |
| 5 | BXI – 10 | -20 | 36E | 102 | 35E | 5 | 188 |
| 6 | DRO – 4 | -10 | 57E | 81 | 56E | 7 | 190 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.