Astronomy:NGC 5042

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NGC 5042
Image Description: A spiral galaxy. It’s noticeably bright around the central region of its disc, then dims somewhat out to the edge where there are fewer stars. Two spiral arms circle through the disc and emerge beyond its edge, around the galaxy’s sides. Many pink spots of new star formation, as well as dark reddish strands of dust, cover the galaxy. The arms contain some speckled, blue patches containing hot stars.
NGC 5042 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationHydra
Right ascension 13h 15m 31.1269s[1]
Declination−23° 59′ 00.958″[1]
Redshift0.004637[1]
Helio radial velocity1,390±1 km/s[1]
Distance47.88 ± 2.37 Mly (14.680 ± 0.726 Mpc)[1]
Apparent magnitude (V)11.8[1]
Characteristics
TypeSAB(rs)c[1]
Size~80,800 ly (24.77 kpc) (estimated)[1]
Apparent size (V)4.2′ × 2.2′[1]
Other designations
ESO 508- G 031, IRAS 13127-2343, MCG-04-31-043, PGC 46126[1]

Coordinates: Sky map 13h 15m 31.1269s, −23° 59′ 00.958″ NGC 5042 is an intermediate spiral galaxy in the constellation of Hydra. Its velocity with respect to the cosmic microwave background for is 1,697±22 km/s, which corresponds to a Hubble distance of 81.6 ± 5.8 Mly (25.03 ± 1.78 Mpc).[1] However, 15 non redshift measurements give a much closer distance of 47.88 ± 2.37 Mly (14.680 ± 0.726 Mpc).[2] It was discovered by British astronomer John Herschel on 25 March 1836.[3]

The Hubble Space Telescope's image of NGC 5042 shows its collection of H II regions, brilliant pink gas clouds in its spiral arms, getting their color from hydrogen atoms that have been ionized by ultraviolet light. Many of these clouds are associated with groups of blue stars, often appearing to form a shell around them.[4]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 5042". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+5042. 
  2. ↑ "Distance Results for NGC 5042". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+5042. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 5042". https://cseligman.com/text/atlas/ngc50.htm#5042. 
  4. ↑ "A spiral of the water snake". NASA and the European Space Agency. https://esahubble.org/images/potw2509a/. 

Template:NGC objects:5001-6000



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