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StellarWindow ＞ Users' Guide ＞ Viewing angle automatic adjustment

When clicking the ‘Magnifying Glass’ icon located on the toolbar while the desired celestial body has been activated, the optimum viewing angle is automatically obtained to observe the selected object.

Viewing angle automatic adjustment when selecting a planet

If the desired planet has planetary satellites, the image of the planet is enlarged so that the panoramic view of the radius of the furthest satellite’s orbit is obtained. In the Standard Mode, further image enlargement is possible due to an additional resolution being available enabling the observation of finer planet surface patterns^(*1).In the Light Mode, however, the capacity to automatically enlarge a planet surface image is limited to approximately 100% and further enlargement will therefore deteriorate the visual quality of the image where no finer patterns are able to be observed.
The original viewing angle is restored by reclicking the ‘Magnifying Glass’ icon.

Viewing angle automatic adjustment when selecting a planetary satellite

When selecting a planetary satellite, the viewing angle is automatically adjusted to obtain a resolution that is close to optimum. An additional resolution may be obtained for the surface images of certain satellites. By reclicking the ‘Magnifying Glass’ icon, the viewing angle is automatically adjusted so that the panoramic view covering the entire planetary satellites’ orbits is obtained. This procedure is repeated as long as the desired planetary satellite remains activated and the original viewing angle cannot be restored by using the viewing angle automatic adjustment feature unless deactivating the relevant satellite.To restore the original viewing angle, click any empty space to deactivate the selected planetary satellite and then click the ‘Magnifying Glass’ icon, or, after restoring the viewing angle designed to obtain the panoramic view of the entire satellites’ orbits, click the parent planet so that it becomes activated and then reclick the ‘Magnifying Glass’ icon.

Viewing angle automatic adjustment when selecting a planetary satellite (schematic diagram)
When selecting a planetary satellite, the viewing angle is automatically adjusted in a different manner from when another type of celestial body is selected. Instead of restoring the original viewing field, the second click restores the viewing angle designed to obtain the panoramic view of the entire planetary satellites’ orbits. This enables another planetary satellite to be selected and the image of such a satellite to be automatically enlarged.

Viewing angle automatic adjustment when selecting a star

StellarWindow displays stars as point images and no specific viewing angles are hence provided to enlarge these images. Based on the viewing angle which has been set prior to automatic adjustment, the viewing angle is fixed at 10° or the default viewing field applies.

Viewing angle automatic adjustment when selecting a nebula, star cluster or galaxy

The viewing angle applicable to a celestial body with no photo recorded in StellarWindow is fixed within approximately 20 minutes. In the case of a celestial body with a photo recorded in StellarWindow, the viewing field appropriately increases to view the entire photo. The maximum photo resolution is set at 4,096 x 4,096 pixels and, when it comes to some celestial bodies, an additional resolution may be obtained after such an object has been automatically enlarged (*1). This means that finer images of the object can be obtained by means of further manual enlargement. The original viewing field can be restored by reclicking the ‘Magnifying Glass’ icon.

Viewing angle automatic adjustment when selecting a man-made satellite

When selecting a man-made satellite, the viewing angle is automatically adjusted based on the distance between the satellite and the location of the eyepoint. On the assumption that all man-made satellites are of the same size, the image of the selected satellite is automatically enlarged until it reaches the specific size. The image of a man-made satellite may sometimes be overly enlarged, approximately 20% in excess, depending upon the location of the orbit. This particularly occurs in the cases of the 3D models of HST (Hubble Space Telescope) and ISS (International Space Station). In such a case, decrease the viewing angle manually to obtain the optimum viewing angle. A 3D man-made satellite model appears on the screen in a variety of different ways such as when it is located in the shadow of the earth or when it is located with the sun right behind it. Such a model can barely be observed particularly when it is located in the shadow of the earth.

*1 Additional resolution
An additional resolution may be obtained depending upon the individual settings. When observing a planet or a nebula, it is often the case that a large amount of additional resolution can be obtained if ‘high-resolution photo delay load’ is enabled.

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