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    perihelion tagged posts

    Asteroid’s Comet-like Tail Is Not made of Dust, solar observatories reveal

    April 26, 2023, Categories  Astronomy/Space

    The Large Angle and Spectrometric Coronagraph (LASCO) on the Solar and Heliospheric Observatory (SOHO) imaged asteroid Phaethon through different filters as the asteroid passed near the Sun in May 2022. On the left, the sodium-sensitive orange filter shows the asteroid with a surrounding cloud and small tail, suggesting that sodium atoms from the asteroid’s surface are glowing in response to sunlight. On the right, the dust-sensitive blue filter shows no sign of Phaethon, indicating that the asteroid is not producing any detectable dust.
    Credits: ESA/NASA/Qicheng Zhang

    A weird asteroid has just gotten a little weirder.

    We have known for a while that asteroid 3200 Phaethon acts like a comet...

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    New Extremely Distant Solar System Object found during hunt for Planet X

    October 3, 2018, Categories  Astronomy/Space

    An artist's conception of a distant Solar System Planet X, which could be shaping the orbits of smaller extremely distant outer Solar System objects like 2015 TG387 discovered by a team of Carnegie's Scott Sheppard, Northern Arizona University's Chad Trujillo, and the University of Hawaii's David Tholen. Credit: Illustration by Roberto Molar Candanosa and Scott Sheppard, courtesy of Carnegie Institution for Science.

    An artist’s conception of a distant Solar System Planet X, which could be shaping the orbits of smaller extremely distant outer Solar System objects like 2015 TG387 discovered by a team of Carnegie’s Scott Sheppard, Northern Arizona University’s Chad Trujillo, and the University of Hawaii’s David Tholen.
    Credit: Illustration by Roberto Molar Candanosa and Scott Sheppard, courtesy of Carnegie Institution for Science.

    The newly found object, called 2015 TG387, will be announced Tuesday by the International Astronomical Union’s Minor Planet Center. Astronomers have discovered a new extremely distant object far beyond Pluto with an orbit that supports the presence of an even-farther-out, Super-Earth or larger Planet X.

    Carnegie’s Scott Sheppard and his colleagues – Northern Arizona University’s...

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