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HD 98219, also named Hunahpú, is a subgiant star in the constellation Crater. It has a confirmed exoplanet. At around 4 billion years old, it is a star around 1.3 times as massive as the Sun that has cooled and expanded to 4.5 times the Sun's diameter, brightening to be around 11 times as luminous. The International Astronomical Union (IAU) gave the opportunity to Honduras to name the star Hunahpú as part of NameExoWorlds. Hunahpú was one of the twin gods who became the Sun in K'iche' (Quiché) Mayan mythology.

Planetary system

A gas giant planet with a minimum mass almost double that of Jupiter was discovered as part of a radial velocity survey of subgiant stars at Keck Observatory. The International Astronomical Union (IAU) has named it Ixbalanqué, the twin brother of Hunahpú.

References

1. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. ^ Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.
3. Houk, N.; Smith-Moore, M. (1988). Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0. Bibcode:1988mcts.book.....H.
4. ^ Johnson, John Asher; et al. (2011). "Retired a Stars and Their Companions. VII. 18 New Jovian Planets". The Astrophysical Journal Supplement Series. 197 (2). 26. arXiv:1108.4205. Bibcode:2011ApJS..197...26J. doi:10.1088/0067-0049/197/2/26.
5. ^ "Name ExoWorlds Honduras". NameExoWorlds. IAU. Retrieved 21 December 2019.

v t e Constellation of Crater
List of stars in Crater Crater in Chinese astronomy
Stars	Bayer α (Alkes) β γ δ ε ζ η θ ι κ λ ψ Variable R SZ TV HR 4305 4428 HD 96167 98219 (Hunahpú) 98649 Other BD−10°3166 DENIS-P J1058.7−1548 LP 791-18 WASP-34 (Amansinaya) WD 1054–226
Exoplanets BD-10°3166 b HD 96167 b WASP-31b
Galaxies	NGC 3511 3597 3974 3981 Other Crater 2 1ES 1101-232 LEDA 1000714 PKS 1127-145 RX J1131-1231
Galaxy clusters Abell 1146 NGC 4038 Group
Astronomical events GRB 011211
Category

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• Crater (constellation)
• Planetary systems with one confirmed planet
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• K-type subgiants
• Subgiant-star stubs