The Image Index is a system based on likes received on images, that incentivizes the most active and liked members of the community. Learn more.
The Contribution Index (beta) is system to reward informative, constructive, and valuable commentary on AstroBin. Learn more.
Dates:March 26, 2015 , March 27, 2015 , April 14, 2015 , April 20, 2015
Frames:
Optec 50mm B: 19x600" -25C bin 1x1
Optec 50mm G: 17x600" -25C bin 1x1
Optec 50mm L: 97x360" -25C bin 1x1
Optec 50mm R: 18x600" -25C bin 1x1
Integration: 18.7 hours
Avg. Moon age: 10.18 days
Avg. Moon phase: 30.49%
Bortle Dark-Sky Scale: 2.00
Astrometry.net job: 618547
RA center: 12h 10' 23"
DEC center: +39° 25' 30"
Pixel scale: 1.251 arcsec/pixel
Orientation: -179.657 degrees
Field radius: 0.581 degrees
Resolution: 620x463
NGC 4151 is an intermediate spiral Seyfert galaxy located 43 million light-years from Earth, in the
constellation Canes Venatici. The galaxy was first mentioned by William Herschel on March 17, 1787; it was one of the two Seyfert galaxies described in the paper which defined the term. It is one of the nearest galaxies to Earth to contain an actively growing supermassive black hole; it was speculated that the nucleus may host a binary black hole, with about 40 million and about 10 million solar masses respectively, orbiting with a 15.8-year period. This is, however, still a matter of active debate.
Some astronomers nickname it the "Eye of Sauron" from its appearance.
X-ray source
Astronomers using data from the European Space Agency’s XMM-Newton satellite have found a long-sought X-ray signal from NGC 4151. When the black hole’s X-ray source flares, its accretion disk reflects the emission about half an hour later.
A litte tidal tail can be seen into the bottom of the galaxy...and also in the spiral galaxy NGC 4156..
Credits NASA & Wikipedia
==========================================================================
NGC 4151 es una galaxia espiral tipo Seyfert intermedia,situada a unos 43 millones de años luz ,en la
constelación de Canes Venatici.La primera mención a esta galaxia es de William Herschel,el 17 de Marzo de 1787.Es una de las galaxias más cercanas a la Tierra que contiene un agujero negro supermasivo; se ha especulado que su núcleo puede contener un agujero negro binario, con unas 40 y 10 millones de masas solares respectivamente,orbitando con un período de 15,8 años. Sin embargo, es todavía un debate abierto actual.
Algunos astrónomos apodan a esta galaxia " El ojo de Sauron",dado su aspecto.
Fuente de rayos X.
Utilizando datos del sátélite XMM-Newton perteneciente a la Agencia Espacial Europea,se han encontrado señales de rayos X de período largo provenientes de NGC 4151. Cuando emanan las fuentes de rayos X de los agujeros negros,su disco de acrección refleja su emisión una hora y media después.
Una pequeña corriente de marea puede verse en la parte inferior de la galaxia ..al igual que en la pequeña galaxia espiral NGC 4156.
Créditos NASA & Wikipedia
You have no new notifications. |
This page or operation is not available at the moment, because AstroBin is in READ ONLY mode. For more information, please check out our Twitter feed: https://twitter.com/AstroBin_com
This feature is only offered at higher membership levels.
Would you be interested in upgrading? AstroBin is a very small business and your support would mean a lot!
If this user has been harassing you, and you shadow-ban them, all their activities on your content will be invisible to everyone except themselves.
They will not know that they have been shadow-banned, and the goal is that eventually they will get bored while having caused no harm, since nobody saw what they posted.
You will remove your shadow-ban on this user, and their comments, messages, etc, will appear again on your content.
Please note: You are on a Free account, and when you delete an image, your upload counter does not decrease (unless the image is deleted within 24 hours of uploading it). The Free account is not a way to keep your most recent or best 10 images on AstroBin, but a trial period for you to decide whether or not a paid subscription is worth it. For more information, please click here.
The image will be permanently deleted and cannot be recovered. All its revisions will be deleted too. Are you sure?
You will delete all other revisions (if any), and the originally uploaded image, leaving the current revision as the final and only version of this image.
You will delete all revisions, leaving the originally uploaded image as the final and only version of this image.
Such limitation improves the website as a whole by discouraging people from creating fake accounts to like their own content. Thank you for understanding!
Currently, your Image Index is .
To learn more about the Image Index, please visit the FAQ page. Thanks!
Comments