Hemisphere:  Southern  ·  Constellation: Canis Major (CMa)  ·  Contains:  IC2165  ·  PK221-12.1
Getting plate-solving status, please wait...
IC 2165 A Very Hot Very Small Planetary Nebula, 


Powered byPixInsight

IC 2165 A Very Hot Very Small Planetary Nebula

Imaging telescopes or lenses: Stellarvue SVT 130T

Imaging cameras: SBIG STT 8300M

Mounts: Astro-Physics Mach1AP GTO CP4

Guiding telescopes or lenses: Stellarvue SVT 130T

Guiding cameras: SBIG STT 8300M

Software: Software Bisque TheSky X Professional  ·  photoshop  ·  Starnet ++  ·  CCDWare FocusMax V.4  ·  PixInsight  ·  Straton Destar 2.0  ·  Topaz Denoise AI  ·  3D LUT Creator  ·  Maxim DL  ·  EQMOD  ·  DC-3 Dreams ACP Observatory Control Software  ·  Astro-Physics Command Center (APCC) Software  ·  Annie's Astro Actions Version 7.0

Filters: Astrodon H-alpha 5nm  ·  Astrodon Blue Tru-Balance E-Series Gen 2

Accessory: Moonlite Nitecrawler 3.5  ·  Tolga Astro Alnitak Flat-Man Electroluminescent Flat Fielding Device

Dates:Feb. 18, 2021

Astrodon Blue Tru-Balance E-Series Gen 2: 9x240" (36')
Astrodon Green Tru-Balance E-Series Gen 2: 9x240" (36')
Astrodon H-alpha 5nm: 9x240" (36')
Astrodon Red Tru-Balance E-Series Generation 2: 9x240" (36')

Integration: 2h 24'

Avg. Moon age: 6.24 days

Avg. Moon phase: 38.01%

Astrometry.net job: 4230052

RA center: 6h 21' 42"

DEC center: -12° 59' 9"

Pixel scale: 1.220 arcsec/pixel

Orientation: 178.189 degrees

Field radius: 0.120 degrees

Resolution: 500x500

Locations: Stanford Faculty Observatory (Bortle 6 SQM 18.6), Stanford, California, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Looking to fill empty imaging time decided to check out some planetary nebulae in view. This one is obviously very small but had some interesting history. I could get not details out of it even with H-alpha. But less resolution than cited below.


High-spatial-resolution observation of the small planetary nebula IC 2165.

Hua, C. -T.; Grundseth, B.


The use of a rather large equivalent focal length in an attempt to obtain two-dimensional monochromatic images of the planetary nebula IC 2165, catalogued as a small, high-excitation object of 8 arcsec diameter, with a very faint and very hot central star, is reported. Due to the high spatial resolution of 0.047 arcsec/pixel and the seeing of 0.8 arcsec, detailed structures less than 1 arcsec could be distinguished. The nebula exhibits a more or less homogeneous spheroidal H-alpha image, while the forbidden N II isophote map displays four symmetrical condensations well separated in two lobes. It is concluded that the relative enhancement of forbidden N II in the peripheral zones could be explained by an abundance effect together with the strong collisional excitation due to the high electron density.

Astronomical Journal, Vol. 90, p. 2055-2060 (1985)
Pub Date:
October 1985