Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 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)
- 10
- Number of spots (f)
- 62
- Relative number (R)
- 162
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 20010717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 6 | 08W | 141 | 11W | 2 | |
| 2 | HA – 1 | 16 | 12E | 121 | 09E | 2.5 | |
| 3 | CRO – 9 | 9 | 18E | 115 | 15E | 7.5 | |
| 4 | DAO – 4 | 17 | 25E | 108 | 22E | 5 | |
| 5 | BXO – 3 | 7 | 49E | 84 | 46E | 2.5 | |
| 6 | AX – 1 | -14 | 75W | 208 | 78W | - | |
| 7 | CAI – 21 | -19 | 33W | 166 | 36W | 14.5 | |
| 8 | HA – 5 | -7 | 29W | 162 | 32W | 4.5 | |
| 9 | EAI – 14 | -24 | 57E | 76 | 54E | ~12 | |
| 10 | CRO – 3 | -17 | 57E | 76 | 54E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.