SIPS 1259-4336 is a red dwarf star first documented in 2005, in the constellation Centaurus. It is located around 25 light-years from Earth.

History of observations

Discovery of SIPS 1259-4336 was published in 2005 by Deacon et al. The star was detected by its high proper motion from the Southern Infrared Proper Motion Survey (SIPS).[3]

The star was originally incorrectly thought to be 11.8 light-years from Earth. However, two later sets of observations found it to be at just over 25 light-years, and one of these - the Gaia spacecraft observation - has a much smaller margin of error.

Distance

Later distance estimates of the star, besides trigonometric parallax with high uncertainty from the star's discovery paper,(276±41 mas[3]) include a parallax of "~128 mas" without specific error range from Burgasser et al. (2015). Its cross-references, including for parallax, were the 2005 discovery paper and T. Henry, priv. comm.[4] In independent agreement with the latter, Gaia's Data Release 2 gives a parallax of 129.0505±0.1398 mas.[5]

Variability

The brightness of the star shows a dimming trend, with period in excess of ten years.[1]

References

Notes

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