Daily Sunspot Evaluation
Observation Sheet Sunday, 27 May 1990
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)
- 11
- Number of spots (f)
- 74
- Relative number (R)
- 184
- Observer
- MB
- Reading
- all checks consistent
- File
- 19900527.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AF – 1 | 19 | 68W | 269 | 71W | - | 217 |
| 2 | BXO – 2 | 9 | 68W | 269 | 71W | 6.5 | 207 |
| 3 | AR – 1 | 26 | 19W | 220 | 22W | 0.5 | 213 |
| 4 | BRI – 4 | 11 | 20E | 181 | 17E | 5 | 220 |
| 5 | HA – 3 | 21 | 31E | 170 | 28E | 2.5 | 218 |
| 6 | EKC – 22 | 19 | 53E | 148 | 50E | 13.5 | 221 |
| 7 | ? – 2 | 13 | 84E | 117 | 81E | - | 225 |
| 8 | CKO – 7 | -20 | 40W | 241 | 43W | 10.5 | 210 |
| 9 | CAI – 29 | -13 | 32W | 233 | 35W | 11 | 216 |
| 10 | AR – 2 | -13 | 32E | 169 | 29E | 0.5 | 223 |
| 11 | AX – 1 | -26 | 65E | 136 | 62E | - | 224 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.