Daily Sunspot Evaluation
Observation Sheet Thursday, 15 February 2001
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)
- 6
- Number of spots (f)
- 14
- Relative number (R)
- 74
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20010215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 7 | 14 | 50W | 31 | 52W | ~6 | |
| 2 | DAO – 2 | 4 | 05W | 346 | 07W | ~4 | |
| 3 | HS – 1 | 28 | 04E | 337 | 02E | 1 | |
| 4 | HA – 2 | 19 | 27E | 314 | 25E | 2 | |
| 5 | HA – 1 | -22 | 73W | 54 | 75W | 2 | |
| 6 | HA – 1 | -10 | 69W | 50 | 71W | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.