NGC 1499 (California Nebula)
Characteristics:
Magnitude: ?
Size: 1 x 4 degrees
FOV: 2.6 x 3.9 degrees
Distance:
1140 light years
RA (Jnow): 4h 01m 35s
Dec (Jnow): +36 degrees 25' 52"
Position Angle: minus 2 degrees
Description:
This is a 4 hour Ha exposure of NGC 1499, a large hydrogen emission
nebula in Perseus. NGC 1499 is one of a few nebulae that emit
strongly in both H alpha (red) and H beta (blue), with little OIII
emission, skewing the usual red color typical of emission nebulae
towards the blue. The star responsible for exciting hydrogen
emission from the nebula is thought to be Xi Persei, a "runaway star"
that is described on Rob
Gendler's website. Feel free to check out the larger size
images above, as well as my color image
of this object.
Photographic Details:
Dates: September 16 and 20, 2007: Ha.
Scope: Takahashi
FSQ106 at f5 on the Takahashi NJP
Mount.
Autoguider: SBIG ST-402 with
e-finder.
Camera: STL11K -20C.
Filters: Baader 7nm
Ha filter (50mm unmounted).
Exposures: Ha- 12 x 20'.
Total
exposure 4 hours.
Conditions: Temperature was generally cool 55-60 degrees
F average.
Post-processing:
Calibrated, aligned, and Sigma Clip combined
in Maxim, followed
by DDP
in ImagesPlus (IP). Further processing in Photoshop CS (16
bit format).
Please
note: Graphics on this website may not be reproduced without
author permission.
Back to Ha
Home