GJ 451
GJ 451 is a star 29.91 light-years from the Sun with spectral type K1V_Fe-1.5.
- Object type
- Star
- Distance from Sun
- 29.91 ly
- Spectral type
- K1V_Fe-1.5
- Apparent mag. (V)
- 6.45
- Milliseconds the GPU takes to draw one frame. Shows n/a where the browser offers no GPU timing for web pages, such as Safari.
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- Milliseconds the browser’s main thread spends preparing one frame: moving the camera, placing labels and sending draw commands to the GPU. At 60 frames per second, a whole frame has about 16.7 ms.
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- Frames drawn per second. The map draws only while something changes, so it shows Idle otherwise.
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- Frame rate the map aims for while something moves: 60, or 120 on displays that refresh at 100 Hz or faster, and 30 in power saving mode.
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- How often the display updates, measured from the browser’s animation frames. Shows – until measured.
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- Size of the image the map draws, in device pixels: its size on screen times the pixel ratio.
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- Device pixels drawn per layout pixel: 1.5 on dense displays, and at most 1 in power saving mode.
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- Multisample anti-aliasing, which smooths the edges of lines and shapes. It is set when the page loads, for displays below 1.5 device pixels per layout pixel; denser displays draw at a higher resolution instead.
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- Whether power saving mode is on. It lowers the target frame rate, the resolution and the detail in nebulae and molecular clouds.
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- Draw commands the last frame sent to the GPU, across all passes. Each has a fixed cost, so fewer calls usually make a faster frame.
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- Points drawn in the last frame, such as stars and their halos.
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- Line segments drawn in the last frame, such as the grid and orbits.
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- Triangles drawn in the last frame, the building blocks of shapes and surfaces.
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- Compiled shader programs: the GPU code that draws each kind of object. Counts here and below that keep growing while the view returns to the same content point to a leak.
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- Shapes the map keeps on the GPU, each a set of vertices that objects draw.
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- Images the map keeps on the GPU, such as the star dot and halo shapes and offscreen layers.
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Origin: Sun Visibility from: Sirius A Distance from viewer: —
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