SIRIUS ET SIRIUS B 15/03/2020 20H30 NEWTON 625 MM FOCALE 2730 FILTRE ANTI UV IR CAMERA QHY5III 178C IMAGE A 100% TURBULENCE MOYE (CATHALA Luc)

SIRIUS ET SIRIUS B 15/03/2020 20H30 NEWTON 625 MM FOCALE 2730 FILTRE ANTI UV IR CAMERA QHY5III 178C IMAGE A 100% TURBULENCE MOYE

Acquisition type: Lucky imaging

SIRIUS ET SIRIUS B 15/03/2020 20H30 NEWTON 625 MM FOCALE 2730 FILTRE ANTI UV IR CAMERA QHY5III 178C IMAGE A 100% TURBULENCE MOYE

Acquisition type: Lucky imaging

Sirius B est plus petite que la Terre, avec un diamètre de 12.000 km, mais sa masse équivaut à 98% de celle du Soleil. Elle est donc très dense. La température à sa surface est de 25.000°C, contre 10.000°C pour Sirius. Le champ gravitationnel de la naine blanche est 350.000 fois plus puissant que celui de la Terre, ce qui signifie qu’une personne de 68 kg pèserait 25 millions de kg à la surface de Sirius B, expliquent les chercheurs.

Sirius B est la naine blanche la plus proche de nous, située à 8,6 années lumière. Or les naines blanches sont les restes d’étoiles similaires à notre Soleil. Cependant, ce compagnon étant 10.000 fois moins brillant que Sirius, il est difficile de l’étudier avec les télescopes terrestres.

Vitesse exposition : 0.056 seconde

Facilement visible à l'écran de l'ordinateur. Focale utilisée 2730 mm sans ADC.

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	Basic failed
Started	...
Astrometry.net job	3321155
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Contribution Index (beta):

SIRIUS ET SIRIUS B 15/03/2020 20H30 NEWTON 625 MM FOCALE 2730 FILTRE ANTI UV IR CAMERA QHY5III 178C IMAGE A 100% TURBULENCE MOYE

SIRIUS ET SIRIUS B 15/03/2020 20H30 NEWTON 625 MM FOCALE 2730 FILTRE ANTI UV IR CAMERA QHY5III 178C IMAGE A 100% TURBULENCE MOYE

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Image Index:

Contribution Index (beta):

SIRIUS ET SIRIUS B 15/03/2020 20H30 NEWTON 625 MM FOCALE 2730 FILTRE ANTI UV IR CAMERA QHY5III 178C IMAGE A 100% TURBULENCE MOYE

SIRIUS ET SIRIUS B 15/03/2020 20H30 NEWTON 625 MM FOCALE 2730 FILTRE ANTI UV IR CAMERA QHY5III 178C IMAGE A 100% TURBULENCE MOYE

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