This planetary nebula in Hercules is claimed to have a distance of about 6500 light years. Its central star has designation HD 151121, and according to the Tycho catalog, its distance is 136.7 light years, which doesn't add up.
A SIMBAD search reveals the central star is of type O7, the radial velocity is -35.6 Km/s (moving away from our solar system) and the parallax is an unreliable -4.0±11.00 mas (!), which corresponds to 250pc, or 815 light years.
2003-03-06: 1 minute exposure (1x60s). Camera cooled to -20°C.
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