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What is comet observation?
2020 / 07 / 17

A recent comet called NEOWISE has burned out of the celestial sphere.It is popular not only because of its brilliance, but also because its two predecessors were so brilliant.It is said that the greater the disappointment of predecessors, the greater the hope of future generations.At the beginning of the year, a comet called C/2019 Y4 (ATLAS) mazed the entire astronomical circle, and there were even exaggerated predictions that its maximum brightness would be close to the sun.Although the prediction was quickly revised, it was still widely believed that it would reach a surprising brightness near the sun in May.

Then came May, and the comet was not bright, it was cool -- it broke up into pieces before it could get close to the observer.Comet C/2020 F8 (SWAN), another high-profile comet, also failed to reach its maximum brightness when it was decomposed, although it was easier to observe than its predecessor, but also failed to meet expectations.History is littered with misjudgments about comets, but for a limited generation, even a replay will be disappointing.At this point, the little-noticed C/2020 F3 (NEOWISE) was born.Almost everything you see in the media right now describes it in terms of "dark horse," "understatement," "obscene growth," "blockbuster," and so on.Just one word: it's so bright.A few days ago it was a second-class star, but now it has gone up to zero.It is currently visible to the naked eye at about dawn before sunrise.It's just as easy to capture with a camera.At current levels of brightness, regular SLR cameras can take pictures quite well.Therefore, NEOWISE's shooting naturally falls into two schools: starfield photography and deep space photography.The difference between starfield photography and deep space photography see: Zero-based Deep space photography 01: Classification of astronomical photography

Open the comet with starfield photography


Although the subjects have changed, the equipment and methods used are basically similar to those used in conventional starfield photography: ordinary DSLR or DSLR modification machines, with short exposures or overlays, supplemented by post-processing of the usual photography.

What is a DSLR?Reference: Zero-based deep space photography 02: A three-piece introduction to the camera

Steed, pictured at Dongling Mountain in Mentougou, Beijing, On July 7, 2020.Canon 6D + red circle 100 micro lens, ISO 1600, F /2.8, single exposure for 5 seconds, sky part 37 superposition.


Look what is the real view (ren) measurement (ying) ah!As is known to all, the soul of starfield photography is dog food and landscape, which, combined with good landscape, can achieve brighter effects.On this basis, if we can add characters to the picture, supplemented by interactive actions or wishing feelings, then the work will have another layer of humanistic meaning....What?You say it's a comet?Is the meteor the one you wish for?Let's think about the definition of a meteor in another way:


You see, doesn't that make sense?There is a hair principle, fork out cough cough......In short, in the face of a great comet that is rarely seen, let's try to have a look, and then make a wish. 


Open the comet with deep space photography


For more hardcore astronomers, there's another way to open up comets: deep space photography.With professional astronomical camera as the eye, astronomical telescope as the interface, zero distance to experience the beauty of the comet.The comet's bright and soft pale gold glow, combined with a deep blue cosmic background, is an elegant, mysterious and perfect match.For the deep space genre, it is better to choose a full-frame camera with a large target surface, otherwise the comet tail may be incomplete.


C/2020 F3 (NEOWISE)

作者:Michael Jäger

设备及参数:QHY600天文相机,Leica-Tele f-280/4.3

RGB each 3x80sec

2020 july 10 UT 1.15

C/2020 F3 (NEOWISE)


设备及参数:QHY268C天文相机 (High Gain Mode, Gain56, Offset30)

SharpStar 150mm f2.8 HNT

C/2020 F3 (NEOWISE)

作者:Gianni Fardelli

设备及参数:QHY 367C天文相机 + Baader UV/IR cut filter

Takahashi FSQ 106 EDX @f/3.6 - Losmandy G11 - - exp 10x60sec

San Giacomo (AP) - Italy

In a word, the Starfield school and the Deep Space school have their own advantages, their own beauty, and their own technical difficulties.Finally, I would like to take out the conclusion of the science series: the equipment itself is not the most important, more important is to yearn for the stars of the heart.Bring a simple pair of good binoculars and your comet will be the most beautiful.

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