Daily Sunspot Evaluation
Observation Sheet Sunday, 15 February 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)
- 43
- Relative number (R)
- 93
- Observer
- YK
- Reading
- all checks consistent
- File
- 19980215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BYO – 3 | 33 | 37E | 7 | 37E | 6 | 30 21 |
| 2 | AX – 1 | 22 | 43E | 1 | 43E | - | 31 22 |
| 3 | HS – 1 | -23 | 70W | 114 | 70W | 0.5 | 02 23 |
| 4 | ESC – 35 | -25 | 10E | 34 | 10E | 11 | 26 24 |
| 5 | BXO – 3 | -20 | 30E | 14 | 30E | 5 | 28 29 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.