Daily Sunspot Evaluation
Observation Sheet Sunday, 28 February 1993
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)
- 49
- Relative number (R)
- 119
- Observer
- HE
- Reading
- all checks consistent
- File
- 19930228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 2 | 17 | 58W | 274 | 60W | 25 | 52 |
| 2 | EAI – 18 | 12 | 23W | 239 | 25W | 12.5 | 47 |
| 3 | DAC – 20 | 10 | 35E | 181 | 33E | 9.5 | 51 |
| 4 | DAO – 2 | -12 | 76W | 292 | 78W | 5 | 43 |
| 5 | BXO – 3 | -18 | 46W | 262 | 48W | 7.5 | 46 |
| 6 | AX – 2 | -13 | 30W | 246 | 32W | 2.5 | 53 |
| 7 | HS – 2 | -12 | 03W | 219 | 05W | 2 | 50 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.