Daily Archives: December 13, 2014

Sombrero Galaxy

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The Sombrero Galaxy (also known as Messier Object 104, M104 or NGC 4594) is an unbarred spiral galaxy in the constellationVirgo located 28 million light-years (8.6 Mpc) from Earth. It has a bright nucleus, an unusually large central bulge, and a prominent dust lane in its inclined disk. The dark dust lane and the bulge give this galaxy the appearance of a sombrero. Astronomers initially thought that the halo was small and light, indicative of a spiral galaxy, but Spitzer found that the halo around the Sombrero Galaxy is larger and more massive than previously thought, indicative of a giant elliptical galaxy.The galaxy has an apparent magnitudeof +9.0, making it easily visible with amateur telescopes, and it’s considered by some authors to be the brightest galaxy within a radius of 10 megaparsecs of the Milky Way.The large bulge, the central supermassive black hole, and the dust lane all attract the attention of professional astronomers.

Telescope / lens shooting: Hubble Space Telescope
Camera to capture: Advanced Camera for Surveys
Guides telescope / lens: Hubble Space Telescope
Resolution: 5465×2952
Dates: May 16, 2003, June 5, 2003, June 8, 2003 June 9, 2003, June 14, 2003
frames:
F435W: 24×675 ”
F555W: 24×500 ”
F625W: 20×350 ”
Accumulation: 9.8 hours
Avg. Age of the Moon: 9.89 days
Avg. Phase of the Moon: 67.07%
Bortlya scale to assess the darkness of the sky: 1.00

Author: Roberto Colombari

Astrofoto of the day from SPONLI, 13.12.2014