Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 July 1999
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)
- 70
- Relative number (R)
- 200
- Observer
- SG0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 16 | 21 | 59W | 334 | 61W | ~14 | |
| 2 | AX – 1 | 16 | 28W | 303 | 30W | - | |
| 3 | HR – 2 | 28 | 21W | 296 | 23W | 1.5 | |
| 4 | HS – 1 | 17 | 18W | 293 | 20W | 2 | |
| 5 | HA – 4 | 22 | 51E | 224 | 49E | 3 | |
| 6 | ? – 3 | 24 | 72E | 203 | 70E | - | |
| 7 | ? – 1 | 16 | 73E | 202 | 71E | - | HS-1 |
| 8 | DAI – 17 | -15 | 06E | 269 | 04E | 5.5 | |
| 9 | HS – 1 | -25 | 12E | 263 | 10E | 1.5 | |
| 10 | BXO – 2 | -22 | 29E | 246 | 27E | 3.5 | |
| 11 | EAO – 10 | -18 | 34E | 241 | 32E | 11.5 | |
| 12 | DKO – 7 | -26 | 28E | 227 ⚠ | 26E | ~9 | |
| 13 | HK – 5 | -29 | 40E | 235 | 38E | ~4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.