Daily Sunspot Evaluation
Observation Sheet Wednesday, 10 July 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)
- 18
- Number of spots (f)
- 101
- Relative number (R)
- 281
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19910710.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 5 | 11 | 75W | 276 | 78W | 6° | 351 |
| 2 | CAI – 9 | 17 | 58W | 259 | 61W | 5° | 342 |
| 3 | AX – 1 | 23 | 54W | 255 | 57W | - | 366 |
| 4 | AR – 2 | 21 | 48W | 249 | 51W | 2° | 344 |
| 5 | AX – 1 | 25 | 46W | 247 | 49W | - | 347 |
| 6 | BXO – 13 | 28 | 38W | 239 | 41W | 11.5 | 343 |
| 7 | CAI – 17 | 36 | 20W | 221 | 22W | 6° | 348 |
| 8 | HK – 7 | 12 | 09W | 210 | 12W | 8.5 | 350 |
| 9 | AX – 2 | 13 | 22E | 179 | 19E | 1° | 368 |
| 10 | AR – 1 | 20 | 28E | 173 | 25E | - | 360 |
| 11 | HA – 1 | -12 | 52W | 253 | 56W | 1.5 | 349 |
| 12 | AX – 1 | -23 | 30W | 231 | 33W | - | 345 |
| 13 | AX – 1 | -27 | 23W | 224 | 26W | - | 354 |
| 14 | AR – 2 | -17 | 15W | 216 | 18W | 1° | 351 |
| 15 | AX – 4 | -2 | 06E | 195 | 03E | 1° | 370 |
| 16 | FKI – 24 | -24 | 37E | 164 | 34E | 20° | 358 |
| 17 | HA – 6 | -11 | 60E | 141 | 58E | 3.5 | 365 |
| 18 | BXO – 4 | -15 | 62E | 139 | 60E | 8° | 371 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.