Daily Sunspot Evaluation
Observation Sheet Saturday, 16 February 1991
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)
- 12
- Number of spots (f)
- 73
- Relative number (R)
- 193
- Observer
- HE
- Reading
- all checks consistent
- File
- 19910216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 5 | 15 | 72W | 11 | 71W | 6° | 61 |
| 2 | HA – 8 | 23 | 14E | 285 | 15E | 2.5 | 64 |
| 3 | AX – 1 | 30 | 68E | 231 | 69E | 77 | |
| 4 | HA – 1 | -13 | 77W | 16 | 76W | 2.5 | 71 |
| 5 | CAI – 17 | -13 | 52W | 351 | 51W | 7° | 74 |
| 6 | CAI – 9 | -9 | 50W | 349 | 49W | 6° | 66 |
| 7 | AR – 2 | -12 | 33W | 332 | 32W | 1° | 67 |
| 8 | AR – 2 | -5 | 24W | 323 | 23W | 0.5 | 68 |
| 9 | AX – 1 | -14 | 08W | 307 | 07W | 69 | |
| 10 | BXO – 8 | -9 | 34E | 265 | 35E | 4.5 | 78 |
| 11 | CAI – 10 | -15 | 39E | 260 | 40E | 12° | 76 |
| 12 | ? – 9 | -16 | 71E | 228 | 72E | 10° | 79 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.