, Volume 38, Issue 2, pp 103–107 | Cite as

The flare star PP Ori

  • N. D. Melikyan
  • V. V. Ambaryan
  • K. N. Grankin
  • S. D. Yakobov


We give the results of photographic, photoelectric, and spectral observations of the flare star PP Ori. The 109 photographic observations used, which were obtained on the 40″ Schmidt telescope of the Byurakan Observatory over a period of about 20 years, and four spectra obtained on the same telescope with a objective prism show no variation in brightness. Photoelectric observations in the UBVR bands using the 50cm and 60cm telescopes of the high-altitude Maidanak station of the Tashkent Astronomical Institute in 1987 and 1989 give grounds for suspecting a variation in brightness much larger than observational errors. Spectral observations of the star PP Ori made on the 2.6m telescope of the Byurakan Observatory show weak Hα emission. The results of all these observations show that PP Ori is an Orion variable of spectral class K7-M0 with absolute visual magnitude7 m 5–8 m 5.


Flare Observational Error Astronomical Institute Spectral Observation Spectral Class 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • N. D. Melikyan
  • V. V. Ambaryan
  • K. N. Grankin
  • S. D. Yakobov

There are no affiliations available

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