Wolf-Lundmark-Melotte (WLM)

Irregular Galaxy Wolf-Lundmark-Melotte (WLM, DDO 221, UGCA 444, A2359), type Ir+, in Cetus

[WLM image]

00 : 02.0
-15 : 28
Ir +, IB(s) IV-V
-42 km/s
3400 kly
Apparent Dimension:
12 x 4 '
8 kly
10.9 m_vis
Absolute Mag:
WLM is named for its discoverers: Max Wolf found it in 1909, and Knut Lundmark and P.J. Melotte (1926) revealed its nature as external galaxy.

Its discovery occurred just a year too late to be included in the second IC catalog (IC II) which had appeared in 1908.

The distance of WLM is given at discordant values in recent compilations. While the ESO press release gives a distance which, corrected for the refined Cepheid distance scale by the Hipparcos satellite, is our adopted distance of 3.4 million light years; this is intermediate between the distances of Irwin (1998), van den Bergh (2000) and Mateo (1999), who gave values, refined for the Hipparcos data, of 3430, 3405 and 3375 kly, respectively. A previous estimate had pushed it out to 4.2 million light-years, and the database of Ferrarese et.al. (1999) gives a value of 17.8 times the distance of the Large Magellanic Cloud (LMC), or about 3180 kly.

ESO Press Release Image.

[WLM, Phil Massey/Local Group Survey]

Image of the WLM Local Group dwarf galaxy, as observed with the CTIO Blanco 4-m telescope and Mosaic II camera as part of the NOAO-sponsored Local Group Survey headed by Philip Massey of Lowell Observatory. The image is a true-color combination of images in three of the filters used by the survey.

  • More information on this image (NOAO)
  • Local Group Survey download page at CTIO
  • Local Group Survey home

    [WLM, M. Germano] Martin Germano obtained this gorgeous image of WLM.


    [Local Group Home] | [SEDS] | [MAA] | [DSS] | [NED] | [SIMBAD] | [ADS]
    Hartmut Frommert
    Christine Kronberg

    Last Modification: June 22, 2012