Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles) (Corine Yahia (RIGEL33))

Celestial hemisphere: Northern · Constellation: Auriga (Aur) · Contains: Solar system body or event

Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles), Corine Yahia (RIGEL33)

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Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles)

Link to TIFF/FITS: https://flic.kr/p/Rz9aF4

Powered byPixInsight

Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles)

Link to TIFF/FITS: https://flic.kr/p/Rz9aF4

Purée de pois et boule de neige sale

En cette soirée de la fin février, le ciel était moyen avec beaucoup de voiles nuageux. L’observation était plus indiquée que l’astrophotographie mais la comète C/2018 Y1 (Iwamoto) approchait de la constellation du Cocher et de ses amas. Il me fallait l’immortaliser… ou, du moins, tenter de le faire. En plus, mon n’amoureux m’avait prêté son objectif Sigma 70-300 pour le tester sur un grand champ.

C/2018 Y1 est une comète quasi-parabolique, découverte par Masayuki Iwamoto le 20 décembre 2018. Elle est passée au plus près du Soleil le 7 février 2019, et au plus près de la Terre le 12 février 2019 à environ 45 millions de kilomètres (0,3 UA). Sa période orbitale est de 1.371 années.

Suite à un faux départ, je dus jeter une quarantaine de poses… ensuite, les images n’étaient pas top, assez pâles… mais au fur et à mesure que la nuit s’avançait et malgré l’installation d’une légère brume, les images devenaient plus belles, plus nettes, plus détaillées. On voit ces voiles nuageux sur le time-lapse.

Malheureusement, vers minuit, le brouillard et sa purée de pois s’imposèrent au Mémorial, nous obligeant à stopper imagerie et observation.

Photos prises le 23 février 2019 à Saucats (33) – Canon 350D défiltré avec objectif Sigma 70-300, focale à 70 mm, F/4.5 sur monture StarAdventurer (sans goto, ni autoguidage).

50 poses de 2 mn – 15 DOF – ISO 800 – IRIS, Toshop, Camera RAW et VirtualDub.

AAA : Astronomes et Astrographes Amateurs

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	3571189
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles)

Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles)

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Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles)

Comète C/2018 Y1 (Iwamoto) au 23022019 (étoiles)

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