Key facts
- Constellation
- Hydra
- Right ascension
- 09 23 30.205
- Declination
- −23 ° 09 ′ 41.37 ″
- Distance
- 110 Mly (35 Mpc ) h , 0.73
- Type
- E3-4
via Wikipedia infobox
Wikidata facts
- Instance of
- elliptical galaxy
- Constellation
- Hydra
- Distance from Earth
- 27.12
- Image
- NGC 2865 Hubble WikiSky.jpg
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- Commons category
- NGC 2865
- catalog code
- PRC C-29
- time of discovery or invention
- 1835-00-00
- discoverer or inventor
- John Frederick William Herschel
- redshift
- 0.008819
- apparent magnitude
- 8.458
- galaxy morphological type
- E...
- right ascension
- 140.8758542
- declination
- -23.1614917
- radial velocity
- 2632
- epoch
- J2000.0
via Wikidata · CC0
~2 min read
Encyclopedic overview
NGC 2865 is an isolated elliptical galaxy in the equatorial constellation of Hydra. The core region of the galaxy shows a kinematically distinct component showing indications of a recent accretion or merger event that led to a burst of star formation around the nucleus. Observational constraints require this to have occurred within the last 100–400 million years, with the merger most likely being an Sb or Sc-class spiral galaxy.
NGC 2865 displays chaotic shell features that are likely the result of an interaction. These shells provide ~11–22% of the galaxy's total luminosity and are generally more blue (younger) than the main galaxy. There is a loop to the northwest and a tail to the southeast of the galaxy, with both being typical of galaxy merger events. Seven HII regions have been identified in the tidal tails, with associated populations of young stars. A ring of neutral hydrogen surrounds the galaxy.
Excerpted from Wikipedia’s “NGC 2865” article, available under the CC BY-SA 4.0 licence.
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