Arp 143  =  NGC 2444  +  NGC 2445

100%  resolution (1.2MB)

Object identification (1.2MB)

200%  crop (0.2MB)

DSLR widefield image

Object data of NGC2444 / NGC2445

Object type: Galaxy (S0) / Galaxy (Irr)
Size: 1.2' x 0.8' / 1.4' x 1.1'
Magnitude: 13.9 mag / 13.9 mag
Constellation: Lyn
Distance: 185 Mio Ly
Notes: The interacting galaxy pair NGC 2444 / NGC 2445 in the constellation Lynx is listed in Arp's Atlas of Peculiar Galaxies as number 143. NGC 2445 was referred to as "the blue nest" by Vorontsov-Velaminov (1959). It has a highly disturbed aspect with many optical knots surrounding the nucleus. The knots are very blue and associated with HII regions and are probably young star clusters.

Three distant galaxy clusters are visible in the image:

  • GxCl 01 (z=0.481): GMBCG J116.86440+38.87871
  • GxCl 02 (z=0.164): WHL J074731.6+391111
  • GxCl 03 (z=0.351): WHL J074538.4+384647

Exposure data

Date: 2018-02-18 until 2018-04-18 (7 nights)
Location: Nussbach / Austria (400m)
Telescope: 12" Newtonian telescope (f=1120mm)
Camera: QSI 660wsg-8 with Astrodon filters
Binning: L 1x1 / RGB 1x1
Mount: ASA DDM85
Exposure time: L 52x8min / R 18x8min / G 18x8min / B 18x8min
Exposure time total: 14h 08min