Comète 88P Howell GC (comète + étoiles) (Corine Yahia (RIGEL33))

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Solar system body or event

Comète 88P Howell GC (comète + étoiles), Corine Yahia (RIGEL33)

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Comète 88P Howell GC (comète + étoiles)

Link to TIFF/FITS: https://flic.kr/p/2kA7ZJD

Powered byPixInsight

Comète 88P Howell GC (comète + étoiles)

Link to TIFF/FITS: https://flic.kr/p/2kA7ZJD

Trois comètes en deux jours !

Les 12 et 13 novembre 2020 durant le second confinement, j’ai sorti à nouveau mes setups dans le jardin d’Ayguemorte-les-Graves. Trois comètes étaient de passage et, pour 2 d’entre elles, je ne les avais jamais imagé. Donc, malgré la pollution lumineuse du lieu, je m’attelais à leur recherche.

Les images sont un peu pourrites mais les conditions étaient vraiment minables. Le gradient a été très difficile à traiter et reste imparfait, ainsi que l’équilibre des couleurs. Mais bon… comment résister à l’appel des comètes ?

La seconde, prise en début de soirée du 13 novembre, est 88P/Howell. C’est une comète périodique qui tourne autour du Soleil en environ 5,5 ans. Elle a été découverte par Ellen Howell en 1985.

Bien qu’elle aussi fût faible en luminosité, j’ai tenté le grand champ car ce soir-là, elle passait près de la planète Jupiter, rapprochement apparent depuis le sol terrestre. A la lunette, on la voyait assez bien car elle arborait une belle coma verte. Seul inconvénient, je n’ai que peu de poses car elle s’est couchée rapidement… d’ailleurs, on peut voir les arbres apparaître sur les images finales. Le plus est que j’ai pu l’imagée en grand champ près de la planète Jupiter.

88P/Howell

Setup grand champ

Canon 350D défiltré partiel + filtre CLS EOS Clip avec objectif 70-300, focale à 133 mm, ouvert à f4.5 sur monture StarAdventurer (sans goto ni autoguidage)

62 poses d’1 mn (film) – 47 poses (photo) – ISO 800 – 25 DOF – Camera RAW, Toshop, VirtualDub et Fitswork

Camera Lens Astrophotography
AAA : Astronomes et Astrographes Amateurs
Suburban Astrophotography
Astrophotographes (France)
Solar System Imaging
Women Astrophotographers
Sky-Watcher Star Adventurer

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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Extremely wide field
Star trails
Northern lights
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Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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	4212310
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Comète 88P Howell GC (comète + étoiles)

Comète 88P Howell GC (comète + étoiles)

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Comète 88P Howell GC (comète + étoiles)

Comète 88P Howell GC (comète + étoiles)

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