Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 March 2002
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)
- 7
- Number of spots (f)
- 29
- Relative number (R)
- 99
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20020312.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 18 | 11E | 221 | 10E | ~1.5 | 77 |
| 2 | AX – 1 | 13 | 24E | 208 | 23E | 77 | |
| 3 | CAO – 6 | 19 | 25E | 207 | 24E | 5 | |
| 4 | HA – 1 | -12 | 46W | 278 | 47W | ~1 | |
| 5 | HS – 1 | -4 | 39W | 271 | 40W | 2 | |
| 6 | EKO – 15 | -11 | 40E | 192 | 39E | ~13.5 | 121 |
| 7 | EAO – 4 | -19 | 57E | 175 | 56E | 11 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.