Hemisphere:  Northern  ·  Contains:  NGC 4151  ·  NGC 4156
Eye of Sauron Galaxy and some tidal tail, 



    
        

            Antonio F. Sánchez
Eye of Sauron Galaxy and some tidal tail
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Technical card

Imaging telescopes or lenses: ASA N12 astrograph

Imaging cameras: FLI ML8300

Mounts: ASA DDM85 S-XL

Software: ASA Autoslew, Sequence...

Filters: Optec 50mm B  ·  Optec 50mm G  ·  Optec 50mm R  ·  Optec 50mm L

Accessory: FLI CFW-2-7 50mm round 7 position filter wheel


Dates:March 26, 2015March 27, 2015April 14, 2015April 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


Basic astrometry details

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

Description

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

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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

Comments

Author

afesan
Antonio F. Sánchez
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Eye of Sauron Galaxy and some tidal tail, 



    
        

            Antonio F. Sánchez