NGC 2439
Open cluster in the constellation Puppis
title: "NGC 2439" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["open-clusters", "puppis", "ngc-objects"] description: "Open cluster in the constellation Puppis" topic_path: "general/open-clusters" source: "https://en.wikipedia.org/wiki/NGC_2439" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Open cluster in the constellation Puppis ::
::data[format=table title="Infobox open cluster"]
| Field | Value |
|---|---|
| name | NGC 2439 |
| image | NGC_2439.png |
| caption | NGC 2439 (taken from Stellarium) |
| epoch | J2000 |
| constellation | Puppis |
| ra | |
| dec | |
| dist_ly | 3.855 kpc |
| appmag_v | 6.9 |
| size_v | 10 |
| radius_ly | 25.2 ± (tidal) |
| names | Cr 158, C 0738-315 |
| :: |
| name = NGC 2439 | image = NGC_2439.png | caption = NGC 2439 (taken from Stellarium) | epoch = J2000 | constellation = Puppis | ra = | dec = | dist_ly = 3.855 kpc | appmag_v = 6.9 | size_v = 10 | radius_ly = 25.2 ± (tidal) | absmag_v = | mass_msol = | age = | notes = | names = Cr 158, C 0738-315
NGC 2439 is a sparse open cluster of stars in the constellation Puppis. It has an apparent visual magnitude of 6.9, an angular size of 10 arcminutes, and is visible using a small telescope. This is a young cluster with age estimates in the range of 20–300 million years. It has a tidal radius of approximately 82 light years. No chemically peculiar stars have been found.
Distance estimates to this cluster vary widely. Piskunov and associates (2008) gave an estimate of . A value in the range 3–4 kpc means the cluster lies well below the Galactic Plane. It is positioned in a hole in the Milky Way's gas and dust, with the reduced absorption resulting in a lower than expected extinction of 1.27 in visual magnitude. This result raises the question of whether this cluster actually exists. It is positioned along the same line of sight as two groups of B-type supergiant stars. The nearer group is located at a distance of 1.03 kpc, while the second group is at 3.2 kpc.
Gallery
File:NGC 2439 map.png|Map showing the location of NGC 2439
References
| title=CCD photometric search for peculiar stars in open clusters. III. NGC 2439, NGC 3960, NGC 6134, NGC 6192 and NGC 6451 | last1=Paunzen | first1=E. | last2=Maitzen | first2=H. M. | journal=Astronomy and Astrophysics | volume=385 | pages=867–873 | date=April 2002 | issue=3 | doi=10.1051/0004-6361:20020184 | bibcode=2002A&A...385..867P | doi-access=free }}
| title=The association surrounding NGC 2439 | display-authors=1 | last1=Kaltcheva | first1=N. | last2=Gredel | first2=R. | last3=Fabricius | first3=C. | journal=Astronomy and Astrophysics | volume=372 | pages=95–104 | date=June 2001 | doi=10.1051/0004-6361:20010380 | bibcode=2001A&A...372...95K | doi-access=free }}
| last1=Wu | first1=Zhen-Yu | last2=Zhou | first2=Xu | last3=Ma | first3=Jun | last4=Du | first4=Cui-Hua | title=The orbits of open clusters in the Galaxy | journal=Monthly Notices of the Royal Astronomical Society | volume=399 | issue=4 | pages=2146–2164 | date=November 2009 | arxiv=0909.3737 | bibcode=2009MNRAS.399.2146W | doi=10.1111/j.1365-2966.2009.15416.x | doi-access=free | s2cid=6066790 }}
| first=Michael E. | last=Bakich | date=2010 | page=29 | title=1001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers | series=Patrick Moore's Practical Astronomy Series | publisher=Springer | isbn=978-1-4419-1776-8 }}
| title=Tidal radii and masses of open clusters | display-authors=4 | last1=Piskunov | first1=A. E. | last2=Schilbach | first2=E. | last3=Kharchenko | first3=N. V. | last4=Röser | first4=S. | last5=Scholz | first5=R.-D. | journal=Astronomy and Astrophysics | volume=477 | issue=1 | pages=165–172 |date=January 2008 | doi=10.1051/0004-6361:20078525 | doi-access=free | bibcode=2008A&A...477..165P }} See online data.
| title=The distribution of bright OB stars in the Canis Major-Puppis-Vela region of the Milky Way | last1=Kaltcheva | first1=N. T. | last2=Hilditch | first2=R. W. | journal=Monthly Notices of the Royal Astronomical Society | volume=312 | issue=4 | pages=753–768 | date=March 2000 | doi=10.1046/j.1365-8711.2000.03170.x | doi-access=free | bibcode=2000MNRAS.312..753K }}
| author=Dias W.S. | author2=Alessi B.S. | author3=Moitinho A.| author4=Lepine J.R.D. | title=New catalog of optically visible open clusters and candidates | journal=Astronomy and Astrophysics | volume=389 | issue=3 | pages=871–873 | date=July 2002 | bibcode=2002A&A...389..871D | arxiv=astro-ph/0203351 | doi=10.1051/0004-6361:20020668 | s2cid=18502004 }} Note: see the VizieR catalogue B/ocl.
References
- "NGC 2439".
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::