Daily Sunspot Evaluation
Observation Sheet Thursday, 28 January 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)
- 3
- Number of spots (f)
- 4
- Relative number (R)
- 34
- Observer
- TA
- Reading
- all checks consistent
- File
- 19990128.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 1 | 23 | 41W | 187 | 43W | ~1 | |
| 2 | HR – 1 | 23 | 22W | 168 | 24W | ~1 | |
| 3 | HR – 2 | 17 | 21W | 167 | 23W | 0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.