Daily Sunspot Evaluation
Observation Sheet Thursday, 19 July 2001
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)
- 77
- Relative number (R)
- 207
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20010719.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 6 | 11 | 73W | 179 | 76W | 6 | |
| 2 | HS – 1 | 6 | 35W | 141 | 38W | ~2 | |
| 3 | HS – 2 | 16 | 14W | 120 | 17W | 2 | |
| 4 | HA – 1 | 8 | 13W | 119 | 16W | 0.5 | |
| 5 | HS – 7 | 18 | 01W | 107 | 04W | 4.5 | |
| 6 | CRF – 14 | 8 | 21E | 85 | 18E | ~6 | |
| 7 | CAO – 7 | 17 | 48E | 58 | 45E | 7.5 | |
| 8 | HA – 4 | -19 | 65W | 171 | 68W | ~4 | |
| 9 | HA – 3 | -8 | 58W | 164 | 61W | 1.5 | |
| 10 | HA – 3 | -15 | 24E | 82 | 21E | 2 | |
| 11 | DAC – 10 | -17 | 31E | 75 | 28E | 6.5 | |
| 12 | EAC – 18 | -23 | 32E | 74 | 29E | 15 | |
| 13 | HR – 1 | -4 | 54E | 52 | 51E | 0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.