PN LoTr 5

100%  resolution (1.2MB)

Object identification (1.2MB)

DSLR widefield image

Object data of PN LoTr 5

Object type: Planetary nebula
Size: 8.7'
Magnitude: -
Constellation: Com
Distance: 1,650 Ly
Notes: PN LoTr 5 (Longmore-Tritton 5) is a large, faint planetary nebula in the constellation of Coma Berenices in a distance of 1,650 light-years.

The central system at LoTr 5 is a binary star, which consists of an evolved G-type star (IN Comae Berenices) and a hot white dwarf that is responsible for ionizing the nebula. The white dwarf is one of the hottest stars known, with an effective temperature of about 150,000 K.

IN Comae Berenices is known to be a variable star, with its brightness varying on a cycle that is about 5.9 days long. This corresponds to the rotation period of the star, and the variability is attributed to starspots.

LoTr 5 has the highest galactic latitude of any known planetary nebula, being only 1.5 degrees away from the galactic north pole. This is the reason why so many distant galaxy clusters are visible in the field around this planetary nebula. See object identification image:

  • GxCl 01 (z=0.246): WHL J125429.8+254502
  • GxCl 02 (z=0.193): WARP J1254.6+2545
  • GxCl 03 (z=0.233): WARP J1254.8+2550
  • GxCl 04 (z=0.241): GMBCG J193.66175+25.87041
  • GxCl 05 (z=0.231): WHL J125545.6+260507
  • GxCl 06 (z=0.464): 2XMM J125540.1+255843
  • GxCl 07 (z=0.212): WHL J125602.3+255637
  • GxCl 08 (z=0.280): WHL J125650.1+254810
  • GxCl 09 (z=0.235): MaxBCG J194.12823+25.76331
  • GxCl 10 (z=0.258): WHL J125620.1+254554
  • GxCl 11 (z=0.236): NSC J125633+254402


Exposure data

Date: 2021-03-24 until 2021-05-03 (10 nights)
Location: Nussbach / Austria (400m)
Telescope: 12" Newtonian telescope (f=1120mm)
Camera: QSI 660wsg-8 with Astrodon filters
Binning: L 1x1 / RGB 1x1 / Ha 5nm 1x1 / [OIII] 3nm 1x1
Mount: ASA DDM85
Exposure time: L 54x8min / RGB 16x8min each / Ha 60x16min / [OIII] 60x16min
Exposure time total: 45h 36min