Daily Sunspot Evaluation
Observation Sheet Friday, 13 March 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)
- 5
- Number of spots (f)
- 30
- Relative number (R)
- 80
- Observer
- NA
- Reading
- all checks consistent
- File
- 19980313.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 47 | 03W | 66 | 01W | - | 444 |
| 2 | AX – 1 | -18 | 36W | 99 | 37W | - | 45 |
| 3 | HS – 1 | -17 | 41E | 22 | 40E | 2 | 436 |
| 4 | BXI – 7 | -22 | 29E | 34 | 28E | 6 | 503 |
| 5 | FAO – 20 | -41 | 0 | 63 | 01W | 11.5 | 406 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.