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Few planetaries show such an intense pure blue color as NGC1535 does. This 9.6 magnitude object lies low in the southern sky on cold winter nights, its blue color seemingly suggesting cold temperatures. A fairly large object at 1 arcminute, a bit smaller than the Ring Nebula in Lyra, but every bit as bright. The central star is 12.1 magnitude and a sky blue color seen here, nearly overwhelmed by the blue of the nebula itself.

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST8i NABG
Guider: SBIG ST4
Exposure:  LRGB = 80:20:20:40 
RGB Combine Ratio:  1: .8: 1.2
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FWHM = 4.0 arcsec (Maxim DL - 10min subframe), Transparency 7/10
Outside Temperature:  0 C
CCD Temperature:  -20 C
Processing Tools:  Maxim DL, RG Sigma, Photoshop, AIP4WIN

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