Orion, down under

LITFrom the Southern Hemisphere, Orion appears "upside down" (Rigel above Betelgeuse when it is high in the north), and the Moon's face looks flipped: same sky, observer turned around. Coordinates (J2000, approximate): Betelgeuse RA 88.79°, Dec +7.41°; Rigel 78.63°, −8.20°; Bellatrix 81.28°, +6.35°; Saiph 86.94°, −9.67°; belt Alnitak 85.19°, −1.94°; Alnilam 84.05°, −1.20°; Mintaka 83.00°, −0.30°.

COMPUTEDEach star's altitude/azimuth at transit is computed for the observer latitude on the slider and projected to look along the meridian. As latitude moves south past the equator the view turns 180°: the parallactic rotation is exact. Nesting: the stars in their colours, red Betelgeuse and blue Rigel, in the void.

latitude ° moon

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