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Barnard b is an extrasolar planet orbiting Barnard's Star, one of the closest celestial neighbours to our Sun. Its discovery was made using the radial velocity method, and it was announced in late 2024. This planet is believed to be smaller than Earth and take just three days to complete an orbit around Barnard's star.
Characteristics
[edit]The minimum mass of Barnard b, measured by radial velocity observations, is of 0.37 Earth masses. Assuming that this value is correct, this would imply that Barnard b is one of the s
Designation
[edit]The designation Barnard b/Barnard's Star b follows the exoplanet naming convention. In this convention, planets are named by adding a lowercase roman letter (a, b, c, d) to the host star's name. So, if e.g. a planet was discovered around Rigel, the planet's name would be Rigel b.[1] The Barnard's Star has many designations, so other names can be assigned to the planet, such as V2500 Ophiuchi b or Gliese 699 b.
This designation has also been used to another planet believed to orbit Barnard's Star, intially discovered in 2018, and now known to be an artifact of stellar activity. This disproven planet was thought to be a Super-Earth orbiting in the snow line of the star.[2]
- ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2024-10-09.
- ^ Ribas, I.; Tuomi, M.; Reiners, Ansgar; Butler, R. P.; et al. (2018-11-14). "A candidate super-Earth planet orbiting near the snow line of Barnard's star" (PDF). Nature. 563 (7731). Holtzbrinck Publishing Group: 365–368. arXiv:1811.05955. Bibcode:2018Natur.563..365R. doi:10.1038/s41586-018-0677-y. hdl:2299/21132. ISSN 0028-0836. OCLC 716177853. PMID 30429552. S2CID 256769911. Archived (PDF) from the original on 2019-03-26.