Daily Sunspot Evaluation
Observation Sheet Monday, 28 February 1983
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)
- 9
- Number of spots (f)
- 29
- Relative number (R)
- 119
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19830228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 4 | 11 | 35W | 226 | 37W | 45 | 50 |
| 2 | CKO – 4 | 14 | 11E | 180 | 09E | 55 | 51 |
| 3 | HAX – 1 | -11 | 70W | 261 | 72W | 57 | |
| 4 | HSX – 1 | -8 | 57W | 248 | 59W | 175 | 49 |
| 5 | DAI – 6 | -9 | 42W | 233 | 44W | 9 | 52 |
| 6 | CAI – 5 | -16 | 10E | 181 | 08E | 35 | 55 |
| 7 | HAX – 4 | -16 | 20E | 171 | 18E | 3 | 53 |
| 8 | HHX – 1 | -19 | 32E | 159 | 30E | 3 | 54 |
| 9 | DKO – 3 | -18 | 68E | 123 | 66E | 10 | 56 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.