Hoag's Object
Sign in to savenon-typical galaxy of the type known as a ring galaxy
Key facts
- Constellation
- Serpens Caput
- Right ascension
- 15 17 14.407
- Declination
- +21 ° 35 ′ 07.856 ″
- Redshift
- 0.042 423 ± 0.000 009
- Heliocentric radial velocity
- 12,718 ± 3 km/s
- Galactocentric velocity
- 12,795 ± 4 km/s
- Distance
- 594.3 ± 41.75 Mly (182.2 ± 12.8 Mpc ) h , 0.6774 , ( Comoving ) , 558 Mly (171.1 Mpc ) h , 0.6774 , ( Light-travel )
- Magnitude j
- 14.230 ± 0.046
- Magnitude h
- 13.536 ± 0.046
- Magnitude k
- 13.230 ± 0.044
- Type
- (RP)E0 or (RP)SA0/a
- Size
- 148,110 ly × 87,377 ly, (45.41 kpc × 26.79 kpc), ( diameter ; 25.0 B-mag arcsec ) , 100,550 ly × 86,464 ly, (30.83 kpc × 26.51 kpc), ( diameter ; "total" magnitude )
- Apparent size v
- 0.342 357 ′ × 0.317 57 ′
- Notable features
- Ring galaxy
via Wikipedia infobox
Wikidata facts
- Named after
- Arthur Hoag
- Constellation
- Serpens
- Distance from Earth
- 600000000
- Radius
- 50000
- Image
- Hoag's object.jpg
Show 11 more facts
- discoverer or inventor
- Arthur Hoag
- time of discovery or invention
- 1950-01-01
- Commons category
- Hoag's Object
- galaxy morphological type
- 3
- catalog code
- Gaia DR2 1214955817502973568
- redshift
- 0.04244
- right ascension
- 229.31002817436100
- declination
- 21.58551579609710
- apparent magnitude
- 14.726
- radial velocity
- 12453
- epoch
- J2000.0
Sources (2)
via Wikidata · CC0
~5 min read
Encyclopedic overview
Hoag's Object is an unusual ring galaxy in the constellation of Serpens Caput. It is named after Arthur Hoag, who discovered it in 1950 and identified it as either a planetary nebula or a peculiar galaxy. The galaxy has a D25 isophotal diameter of 45.41 kiloparsecs (148,000 light-years).
Characteristics
Excerpted from Wikipedia’s “Hoag's Object” article, available under the CC BY-SA 4.0 licence.