Daily Sunspot Evaluation
Observation Sheet Monday, 27 May 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)
- 13
- Number of spots (f)
- 100
- Relative number (R)
- 230
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910527.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 15 | 18 | 40W | 100 | 40W | 7.5 | 243 |
| 2 | BRI – 9 | 20 | 31W | 91 | 31W | 6° | 250 |
| 3 | EKC – 31 | 21 | 11E | 49 | 11E | 11.5 | 245 |
| 4 | CAO – 3 | 6 | 73E | 347 | 73E | 5° | 253 |
| 5 | AX – 1 | 9 | 80E | 340 | 80E | 1° | 254 |
| 6 | BXO – 4 | -13 | 74W | 134 | 74W | 5° | 246 |
| 7 | BXI – 15 | -25 | 03W | 63 | 03W | 6° | 251 |
| 8 | BXO – 4 | -24 | 24E | 36 | 24E | 4° | 255 |
| 9 | AX – 1 | -19 | 28E | 32 | 28E | 256 | |
| 10 | BXO – 9 | -12 | 31E | 29 | 31E | 4.5 | 257 |
| 11 | HS – 1 | -14 | 40E | 20 | 40E | 2° | 249 |
| 12 | HK – 6 | -9 | 63E | 357 | 63E | 3.5 | 252 |
| 13 | AX – 1 | -8 | 79E | 341 | 79E | 1° | 258 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.