IC 142 - HII Ionized region in Triangulum
IC 142 is a HII Ionized region in the Triangulum constellation. IC 142 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
Photometric information of IC 142
The following table lists the magnitude of IC 142 in different bands of the electomagnetic spectrum (when available), from the B band (445nm wavelength, corresponding to the Blue color), to the V band ( 551nm wavelength, corresponding to Green/Yellow color), to the J, H, K bands (corresponding to 1220nm, 1630nm, 2190nm wavelengths respectively, which are colors not visible to the human eye).
For more information about photometry in astronomy, check the photometric system article on Wikipedia.
Apparent size of IC 142The following table reports IC 142 apparent angular size. The green area displayed on top of the DSS2 image of IC 142 is a visual representation of it.
Digitized Sky Survey image of IC 142
The image below is a photograph of IC 142 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins).
Celestial coordinates and finder chart of IC 142
Celestial coordinates for the J2000 equinox of IC 142 are provided in the following table:
The simplified sky charts below show the position of IC 142 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.