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NGC 638

galaxy

Key facts

Constellation: Pisces
Right ascension: 01 39 37.8
Declination: 07 ° 14 ′ 14 ″
Redshift: +0.010547 ± 0.000007
Heliocentric radial velocity: 3,162 km/s
Distance: 42.24 ± 2.97 Mpc (137.8 ± 9.7 Mly )
Surface brightness: 12.81 mag/am
Type: Barred spiral galaxy
Size: 47,200 ly (24.48 kpc )
Apparent size v: 0.8 arcminites × 0.5 arcminites

via Wikipedia infobox

Wikidata facts

Image: NGC 0638 SDSS.jpg

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Article

NGC 638 is a barred spiral galaxy located in the constellation of Pisces. Its velocity speed to the cosmic microwave background is 2,864± 21 km/s, which corresponds to a Hubble's law of 42.2 ± 3.0 Mpc (~138 million light-year). NGC 638 was discovered by American astronomer Lewis A. Swift in 1886.

NGC 638 has a broad Hydrogen line. NGC 638 is a galaxy whose nucleus shines in the ultraviolet domain. It is listed in the Markarian catalogue under the code Mrk 1003 (MK 1003).