The "Winter Ellipse" is an asterism that includes Rigel, Sirius, Castor, Pollux, Capella, and Aldebaran, the brightest stars in six constellations: Orion, Canis Major, Canis Minor, Gemini, Auriga, and Taurus. On which day will the "Winter Ellipse" be visible on the eastern horizon?December 21Decmber 22December 23