Irregular Galaxy Wolf-Lundmark-Melotte (WLM, DDO 221, UGCA 444, A2359),
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.
- 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:
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.
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
Martin Germano obtained
this gorgeous image of WLM.
- WLM page
within the SEDS Messier database
- P.J. Melotte, 1926.
New nebulae shown on Franklin-Adams chart plates.
Monthly Notices of the Royal Astronomical Society, Vol. 86, pp. 636-638
Melotte states that this nebula was "also independently noted by Dr.
[Knut] Lundmark when examining the same [photographic] plates."
- Max Wolf, 1913.
Koenigstuhl-Nebel-Liste 11 : mittlere oerter, Beschreibung und
Helligkseitsvergleichung von 94 Nebelflecken bei Alpha Ceti.
Veroeffentlichungen der Grossherzoglichen Sternwarte zu Heidelberg
(Koenigstuhl), Bd. 6, No. 2, pp. 5-8
[Local Group Home] |
Last Modification: June 22, 2012