MARS (Didier FOURNIL)

Contains: Solar system body or event

MARS

A propos de Mars...

Les zones claires sont des plaines de basalte, recouvertes d' une fine couche de poussières chargées en oxyde de fer, donnant à mars sa couleur orangé. Les zones sombres sont des plateaux rocheux formés de cratères.

Les calottes polaires quant à elles, sont formées de glace d'eau et de glace carbonique. Elles se subliment en partie et rétrécissent lors des étés martiens.

Mars peut se cacher sous des tempêtes de poussières, ou encore montrer de fins nuages blanc-bleu de glace carbonique ou de glace d'eau, près du limbe équatorial.

Conditions de prise de vue:

Présence de brouillard, mais atmosphère extrêmement stable, très peu de turbulences...

Réalisation d'une vidéo de 3200 images, sélection des 478 meilleures.

SEEING: 1.07

Mag -0.65

Diamètre Apparent: 13.1"

Distance 0.718 UA

Illumination: 97%

Visible sur ce cliché:

- En haut, la tache blanche correspond à "Planum Boreum", la plaine du Nord, ou bien encore le Pole Nord...Les sondes martiennes y détectent régulièrement des avalanches, et même des cyclones...

- En bas, relativement centrée, une bande sombre est particulièrement remarquable. Il s'agit de " Meridiani Planum", gigantesque plaine s' étendant sur 1 100km. En 1870, Camille Flammarion avait nommé cette zone " Sinus Meridiani" c'est à dire la baie du méridien. Cette région a la particularité de receler de l' hématite...

- En périphérie, en bas à droite, se distingue une zone blanche, nommée " Hellas Planitia". Il s'agit d'un bassin d'impact s' étendant sur près de 2 200 km.

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
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
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	n/a
Started	n/a
Astrometry.net job	n/a
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

MARS

Equipment

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Image Index:

Contribution Index (beta):

MARS

Equipment

Acquisition details

Description

Comments

Histogram

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