Trigonometric Parallaxes of Central Stars of Planetary Nebulae

@article{Harris2007TrigonometricPO,
  title={Trigonometric Parallaxes of Central Stars of Planetary Nebulae},
  author={Hugh C. Harris and Conard C. Dahn and Blaise Joseph Canzian and Harry H. Guetter and Sandy K. Leggett and Stephen E. Levine and Christian B. Luginbuhl and Alice Kay Babcock Monet and David G. Monet and Jeffrey R. Pier and Ronald C. Stone and Trudy M. Tilleman and Frederick John Vrba and Richard L. Walker},
  journal={The Astronomical Journal},
  year={2007},
  volume={133},
  pages={631-638}
}
Trigonometric parallaxes of 16 nearby planetary nebulae are presented, including reduced errors for seven objects with previous initial results and results for six new objects. The median error in the parallax is 0.42 mas, and 12 nebulae have parallax errors of less than 20%. The parallax for PHL 932 is found here to be smaller than was measured by Hipparcos, and this peculiar object is discussed. Comparisons are made with other distance estimates. The distances determined from these parallaxes… 

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