Chi Aquarii

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Chi Aquarii, Latinized from χ Aquarii, is the Bayer designation of a star in the equatorial constellation of Aquarius. The distance to this star, based upon parallax measurements with a 7% margin of error, is roughly Template:Convert. It is visible to the naked eye with an apparent visual magnitude of about 5.

A light curve for Chi Aquarii, plotted from Hipparcos data[1]

The variability of the brightness of Chi Aquarii was announced by Joel Stebbins and Charles Morse Huffer in 1928, based on observations made at Washburn Observatory.[2] This is a red giant star with a spectral classification of M3 III.[3] The interferometry-measured angular diameter of this star is Template:Nowrap,[4] which, at its estimated distance, equates to a physical radius of about 137 times the radius of the Sun.Template:Efn It is classified as a semi-regular variable star and its brightness varies by an amplitude of 0.0636 in magnitude.[5] The identified pulsation periods are 32.3, 38.5, and 44.9 days.[6] Template:Clear left

Notes

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References

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  1. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named CDS
  2. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Stebbins1928
  3. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named mnras162_11
  4. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named aaa431_773
  5. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named mnras331_1_45
  6. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named mnras400_4_1945
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