About Green comet current location
This photo provided by Dan Bartlett shows comet C/2022 E3 (ZTF) on Dec. 19. It last visited during Neanderthal times, according to NASA. It is expected to come within 26 million miles (42 million kilometers) of Earth on Wednesday before speeding away again, unlikely to return for millions of years. (Dan Bartlett via AP)CAPE CANAVERAL, Fla. (AP) — A comet is streaking back our way after 50,000 years.The dirty snowball last visited during Neanderthal times, according to NASA. It will come within 26 million miles of Earth Wednesday before speeding away again, unlikely to return for millions of years.So do look up, contrary to the title of the killer-comet movie “Don’t Look Up.”Discovered less than a year ago, this harmless green comet already is visible in the northern night sky with binoculars and small telescopes, and possibly the naked eye in the darkest corners of the Northern Hemisphere. It’s expected to brighten as it draws closer and rises higher over the horizon through the end of January, best seen in the predawn hours. By Feb. 10, it will be near Mars, a good landmark.Skygazers in the Southern Hemisphere will have to wait until next month for a glimpse.Graphic showing location of the green cometWhile plenty of comets have graced the sky over the past year, “this one seems probably a little bit bigger and therefore a little bit brighter and it’s coming a little bit closer to the Earth’s orbit,” said NASA’s comet and asteroid-tracking guru, Paul Chodas.Green from all the carbon in the gas cloud, or coma, surrounding the nucleus, this long-period comet was discovered last March by astronomers using the Zwicky Transient Facility, a wide field camera at Caltech’s Palomar Observatory. That explains its official, cumbersome name: comet C/2022 E3 (ZTF).On Wednesday, it will hurtle between the orbits
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I've read recent online news media posts about Comet ZTF with a mix of humor and alarm. All this talk about a rare, green comet streaking across the sky that was last seen by the Neanderthals.First, lots of comets are green — at least in the telescope. The color comes from carbon, which glows a striking aqua green when energized by the sun's ultraviolet (UV) light. The hue shows up beautifully in time exposure photographs, and it's occasionally visible in brighter comets when viewed through a telescope. But as far as the naked eye or even binoculars, it's a rare sight. My daughter and I share Comet Neowise together at dawn on a buggy July morning in 2020.Contributed / Bob King While it's true the comet last passed this way some 50,000 years ago, it's very unlikely any Homo sapiens or Neanderthals noticed it unless ZTF made an exceptionally close approach to Earth. This time around it passes relatively nearby but won't be bright in the traditional sense like Comets NEOWISE (in 2020) and Hale-Bopp (1997). With those, you could just step outside, allow a few minutes to get used to the dark and ba-boom — there they were!Comet ZTF is visible in binoculars right now but only from a reasonably dark sky with a minimum of light pollution. Through my 10x50s it's a small, fuzzy glow about 1/3 the size of the full moon with a brighter center and whiff of a tail pointing north. Comet ZTF (C/2022 E3) marches up the northern sky in the next two weeks. To find it, face north and use the labeled stars on the map to help point you to the comet. Brighter stars have proper names. Fainter ones bear letters of the Greek alphabet. In mid-January, ZTF is still low in the northeastern sky before midnight. But by the third week of January it will be easy to view during convenient evening hours. Contributed / Stellarium with additions by Bob King Through a 6-inch or larger telescope, the comet becomes increasingly more impressive. In my 15-inch scope it reveals a bright, dense core (called the nuclear region) buried in a fuzzy coma that sprouts a lovely, fan-shaped tail. No color is visible. At least for now, Comet ZTF is still too faint to see without optical aid, but as you'll learn, that may change later this month. Observers estimate its current
