Daily Sunspot Evaluation
Observation Sheet Sunday, 21 March 1999
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)
- 25
- Relative number (R)
- 95
- Observer
- TA
- Reading
- all checks consistent
- File
- 19990321.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 16 | 66W | 245 | 66W | ~3 | |
| 2 | BXO – 6 | 19 | 43W | 222 | 43W | ~6 | |
| 3 | HR – 3 | -27 | 52W | 231 | 52W | ~2 | |
| 4 | DAI – 7 | -11 | 24W | 203 | 24W | 6.5 | |
| 5 | CRO – 3 | -25 | 06W | 185 | 06W | 3 | |
| 6 | AX – 2 | -17 | 17E | 162 | 17E | 2 | |
| 7 | BXO – 2 | -21 | 40E | 139 | 40E | 6.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.