cometary organics

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Qicheng Zhang
@qicheng@cometary.org
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Here's my experimental spot on the Fediverse. I ponder comets, asteroids, and various extrapolations of such things. Currently a planetary science Ph.D. student at Caltech.
https://near.earth/qz

Joined Dec, 2022
Followed by 6
Following 11
Posted 4

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Qicheng Zhang @qicheng
Feb 04, 14:17

Comet 96P/Machholz has emerged into the predawn sky following its perihelion passage earlier this week. Here it was this morning from Pasadena, at ~2 degrees above the horizon and ~14 degrees from the Sun, with a hint of the first ~5' of its dust tail. Very rough photometry gives a coma r' magnitude of ~7. Observing conditions will rapidly improve over the next week as the comet fades.

Feb 04, 2023, 14:17
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Qicheng Zhang @qicheng
Feb 02, 15:43

Here's comet C/2022 E3 (ZTF) from last week, which looks fairly similar to (albeit brighter than) the view through the eyepiece under light polluted Pasadena skies last night. It's actually not that green of a comet, with its coma brightness being overwhelmingly from dust rather than gas.

Feb 02, 2023, 15:43
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Qicheng Zhang @qicheng
Jan 30, 20:42

Comet 96P/Machholz has just reached its perihelion, at only 0.12 au from the Sun. Here's the view from the SOHO spacecraft's LASCO C3 coronagraph, which has been running a special program observing the comet through several color filters over the last couple days.

Jan 30, 2023, 20:42
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Qicheng Zhang @qicheng
Dec 31, 2022

Hello world

Dec 31, 2022, 23:48
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