Observation by Mike Harlow: IC2149: Low resolution spectrum

Uploaded by

Mike Harlow

Observer

Mike Harlow

Observed

2022 Nov 21 - 00:40

Uploaded

2022 Nov 21 - 14:40

Objects

IC2149
Spectrum

Planetarium overlay

Enable overlay
Show stars
Label stars
Show deep sky objects
Label deep sky objects
Show constellation boundaries
Show constellation sticks
Show constellation labels
Show RA/Dec grid

Constellation

Auriga

Field centre

RA: 05^h56^m
Dec: +46°03'
Position angle: +91°41'

Field size

0°22' × 0°11'

Equipment

12inch F/6.8 Astrograph
Starlight Xpress H16 CCD
Astrodon luminance filter (400-700nm)
26cm, 3-degree objective prism

Exposure

18 x 20 seconds

Location

Ipswich, UK

Target name

IC2149

Title

IC2149: Low resolution spectrum

About this image

A low resolution spectrum of Callum Potter's object of the month for November. IC2149 is a small but bright planetary nebula in Auriga. So bright that in the image above, shown by tick marks, it is saturated with 15 second exposures. The spectrum below the image shows emission images from the hydrogen Balmer series. The brightest feature however is from OIII emission giving the nebula the green colour seen in, for example, Alan Thomas's recent image. The is also a very weak feature near 5870A which could be due to HeI emission(?). The spectrum of the central star isn't resolved but shows a strong continuum down to the 400nm cut-off of the filter indicating a hot star emitting plenty of blue light.

The field of view is the same for each pane above, 22 x 6 arc minutes, with north to the right.

Files associated with this observation

IC2149_20221121_mjh.jpg (249.0 kB)

Like this image

Alan Thomas, Nick James, Richard Sargent, Callum Potter, David Basey

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.

Registered charity no. 210769
Registered company no. 117572

For more information including contact details, click here.

Our Terms of Use are here.

Our Privacy Policy is here.