SDO HMI 2014-09-20 18:00:34 UT
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing)
(It is recommended to set high resolution on your display!)
| group | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 0.62 | 7.36 | 0.36 | 4.24 | -21.91 | 309.87 | -10.15 | 161.33 | 0.5122 | -734.3 | -610.3 | |
|
previous
or next observation for the same group /
back to the solar disc SDO HMI 2014-09-20 18:00:34 UT
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing) (It is recommended to set high resolution on your display!) |
| spot | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 0.00 | 1.95 | 0.00 | 1.12 | -21.78 | 311.10 | -8.92 | 163.36 | 0.5047 | -691.0 | -550.5 | |
| 0.00 | 0.53 | 0.00 | 0.31 | -21.87 | 310.34 | -9.68 | 162.09 | 0.5093 | -582.0 | -538.3 | |
| 0.00 | 0.89 | 0.00 | 0.51 | -22.09 | 309.86 | -10.16 | 161.41 | 0.5146 | -765.0 | -657.2 | |
| 0.00 | 0.71 | 0.00 | 0.41 | -21.92 | 309.64 | -10.37 | 160.93 | 0.5133 | -772.0 | -621.9 | |
| 0.00 | 0.71 | 0.00 | 0.41 | -22.27 | 309.55 | -10.47 | 161.01 | 0.5186 | -684.0 | -586.6 | |
| 0.62 | 1.95 | 0.36 | 1.12 | -21.75 | 309.39 | -10.63 | 160.39 | 0.5122 | -821.9 | -705.9 | |
| 0.00 | 0.62 | 0.00 | 0.36 | -22.17 | 307.76 | -12.25 | 158.00 | 0.5266 | -793.0 | -600.9 | |
| Proj. U | - Projected umbra area in millionths of solar disc, negative values indicate | |
|
that the umbra consists of fragmented regions which cannot be separated without losing umbral area. In this way several spots (intensity minima in the umbra) have a common umbra, e.g. -2 means that the given spot shares an umbra with spot No.2, and the common U value is indicated at spot No.2. |
||
| Proj. WS | - Projected whole spot area in millionths of solar disc, negative values indicate | |
|
that several umbras have a common penumbra, e.g. -7 means that the given umbra shares a penumbra with umbra No.7, and the WS value is indicated at No.7. |
||
| Corr. U | - Corrected umbra area in millionths of solar hemisphere, for negative values see above | |
| Corr. WS | - Corrected whole spot area in millionths of solar hemisphere, for negative values see above | |
| B | - Heliographic latitude B; positive: North, negative: South | |
| L | - Heliographic longitude L | |
| LCM | - Longitudinal distance from the Sun's central meridian | |
| Pos. angle | - Position angle | |
| r | - Distance from the centre of Sun's disc in terms of Sun's radius | |
| MU | - Mean magnetic field within the umbra contour averaged the pixel values with sign. | |
| MP | - Mean magnetic field within the penumbra contour averaged the pixel values with sign. | |