NGC 1784

galaxy

Astronomical data · SIMBAD

Object type: Sy2
Redshift: z = 0.0077866811957210125
Morphology: SB(r)c
Coordinates: RA 76.3630° · Dec -11.8714°

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Key facts

Constellation: Lepus
Right ascension: 05 05 27.1307
Declination: −11 ° 52 ′ 16.766 ″
Redshift: 0.007735 ± 0.000010
Heliocentric radial velocity: 2,319 ± 3 km/ s
Distance: 79.4 ± 14.5 Mly (24.3 ± 4.4 Mpc )
Type: SB(r)c
Size: ~103,900 ly (31.86 kpc ) (estimated)
Apparent size v: 4.0 ′ × 2.5 ′

via Wikipedia infobox

Wikidata facts

Distance from Earth: 31.80
Image: NGC 1784 DSS.jpg

Show 9 more facts

radial velocity: 2325.3
catalog code: [VDD93] 43
time of discovery or invention: 1836-12-11
redshift: 0.007725
apparent magnitude: 8.515
galaxy morphological type: SB(r)c
right ascension: 76.3629917
declination: -11.8714222
Commons category: NGC 1784

Sources (1)

fr.wikipedia.org

via Wikidata · CC0

~2 min read

Article

NGC 1784 is a barred spiral galaxy in the constellation Lepus. The galaxy lies about 80 million light years away from Earth based on redshift independent methods, which means, given its apparent dimensions, that NGC 1784 is approximately 100,000 light years across. Its distance based on redshift is 102 Mly. It was discovered by British astronomer John Herschel on 11 December 1836.

NGC 1784 has a strong bar with dust lanes and patches. Two spiral arms emerge from the end of the bar and form a nearly complete inner ring. The outer spiral arm of the galaxy consists of low-surface-brightness spiral fragments, which complete up to a quarter of revolution before fading. These arms have many knots. Imaging in the hydrogen line shows the presence of a narrow but bright ring. The hydrogen ring is more prominent at the eastern side of the galaxy. Also, the hydrogen appears wrapped, indicative of an interaction with another galaxy. The total hydrogen mass of the galaxy is estimated to be 1.17×10 M☉.