NASA NTRS · 19730030716
The angular diameter of X Cancri.
Abstract
Analysis of an occultation reappearance of the semiregular variable X Cancri observed with the 107-inch telescope of McDonald Observatory on 9 November 1971 by the laser group using slightly modified laser equipment. The problem of the effective temperature of this carbon star is discussed, and estimates near 2500 K are derived both from the occultation data and from an integration based on the multicolor photometry reported by Mendoza (1967). This figure is 300-400 K higher than Mendoza's calibration, and it is clear that unsolved problems remain in many areas connected with these stars.
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Bartholdi, P., Evans, D. S., Mitchell, R. I., Silverberg, E. C., Wells, D. C., Wiant, J. R.. 1972-11-01. The angular diameter of X Cancri.. https://ntrs.nasa.gov/citations/19730030716
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