SDO HMI 2014-04-18 12:00:34 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 |
| 0.00 | 8.05 | 0.00 | 4.23 | -18.67 | 199.94 | -13.02 | 139.93 | 0.3176 | -344.4 | -300.4 | |
|
previous
or next observation for the same group /
back to the solar disc SDO HMI 2014-04-18 12:00:34 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 | 1.15 | 0.00 | 0.58 | -13.98 | 208.11 | -4.85 | 151.41 | 0.1724 | 865.0 | 631.5 | |
| 0.00 | 0.89 | 0.00 | 0.44 | -13.31 | 207.88 | -5.09 | 148.19 | 0.1645 | 785.0 | 578.4 | |
| 0.00 | 0.53 | 0.00 | 0.27 | -13.44 | 205.70 | -7.27 | 139.02 | 0.1885 | -601.0 | -441.7 | |
| 0.00 | 0.97 | 0.00 | 0.50 | -18.34 | 202.01 | -10.96 | 141.49 | 0.2910 | -787.0 | -701.2 | |
| 0.00 | 0.97 | 0.00 | 0.51 | -19.11 | 201.76 | -11.20 | 142.57 | 0.3034 | -874.0 | -672.3 | |
| 0.00 | 1.15 | 0.00 | 0.63 | -23.68 | 194.62 | -18.35 | 137.91 | 0.4319 | -739.0 | -623.2 | |
| 0.00 | 1.24 | 0.00 | 0.68 | -23.87 | 194.49 | -18.48 | 138.03 | 0.4353 | -696.0 | -540.2 | |
| 0.00 | 1.15 | 0.00 | 0.62 | -18.22 | 192.39 | -20.58 | 124.41 | 0.4064 | -708.0 | -516.7 | |
| 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. | |