Q930175

galaxy

Key facts

Constellation: Sextans
Right ascension: 10 51 14.2926
Declination: +05 ° 50 ′ 24.190 ″
Redshift: 0.003349 ± 0.000007
Heliocentric radial velocity: 1,004 ± 2 km/ s
Distance: 42 ± 7.9 Mly (12.9 ± 2.4 Mpc )
Type: SA(s)cd
Size: ~53,000 ly (16.1 kpc ) (estimated)
Apparent size v: 3.8 ′ × 3.2 ′

via Wikipedia infobox

Wikidata facts

Distance from Earth: 11.64
Image: NGC 3423 SDSS.jpg

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catalog code: Gaia DR2 3864408850486799616
Commons category: NGC 3423
time of discovery or invention: 1784-02-23
apparent magnitude: 11.665
redshift: 0.00334
galaxy morphological type: SAcd
right ascension: 162.80968833080830
declination: 5.84004777246520
radial velocity: 1000

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Article

NGC 3423 is a spiral galaxy in the constellation Sextans. The galaxy lies about 45 million light years away from Earth, which means, given its apparent dimensions, that NGC 3423 is approximately 50,000 light years across. It was discovered by William Herschel on February 23, 1784.

NGC 3423 imaged by SDSS NGC 3423 is an unbarred galaxy seen nearly face-on. The galaxy has a low-surface-brightness disk. The galaxy has multiple spiral arms, at least six, with numerous HII regions all over the disk. The largest of them are about 2 arcseconds across. H-alpha emission is stronger at inner part of the disk. The star formation rate is estimated to be 0.7 M☉ per year.