Below is an narrowband CCD image of the region around Alnitak, a bright star in Orion's belt.
The spectrum of Alnitak is below the image, along with more details.
| Object | Alnitak (Zeta Orionis, SAO 132444) |
| Telescope | 14" Meade RCX400 at f/8 |
| Spectrograph / CCD | SBIG SGS, SBIG ST-7XME at -30C; High Resolution = 600 lines/mm |
| Integration Details | 3 x 180s, dark subtracted and median combined |
| Date / Time (UTC) | 08-Jan-2007 0630 UTC |
| Moon Phase | 79% (High) |
| Approximate Airmass | 1.22 |
| CCD Response Curve Source | Epsilon Orionis |
| Wavelength Calibration | H and Ne lamps |
| Software Used | CCDSoft, CCDStack, Iris, vSpec, Excel, Adobe Photoshop |
| Comments | The image was taken on 30-Dec-2006 and
31-Dec-2006 using a 105mm apochromatic refractor at f/5.6, with an ST-10XME and an
Astrodon H-Alpha, OIII, and SII filters with a 60 Angstrom FWHM bandpass.
Click here for more details on the
narrowband image of Alnitak and the Horsehead nebula. The spectrum shows a classic "P Cygni Profile" consisting of a blueshifted absorption overlaying the H-Alpha emission line, suggesting either an expanding gas shell or a stellar wind surrounding the star. |