Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 May 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)
- 4
- Number of spots (f)
- 10
- Relative number (R)
- 50
- Observer
- HE
- Reading
- all checks consistent
- File
- 19930518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 9 | 24W | 278 | 24W | 1.5 | 118 |
| 2 | BXO – 4 | 14 | 11W | 265 | 14W | 2.5 | 125 |
| 3 | AX – 2 | -13 | 07W | 261 | 10W | 1 | 125 |
| 4 | AX – 2 | -18 | 04E | 250 | 01E | 1 | 125 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.