2MASS J08152329-3859234, also known as ASASSN-21qj, is a Sun-like main sequence star with a rotating disk of circumstellar dust and gas which are leftovers from its stellar formation around 300 million years ago. The star is located 1,850 light years (567.2 parsecs) from Earth in the constellation of Puppis.[1]

In 2023, a scientific paper reported observations consistent with two ice-giant type exoplanets of several to tens of Earth masses having undergone a planetary collision event. The collision occurred at a distance of 2-16 AU (astronomical units) from the star.[2][3]

References

  1. ↑ Anderson, Natali (2023-10-11). "Astronomers Detect Afterglow of Collision between Two Ice-Giant Exoplanets | Sci.News". Sci.News: Breaking Science News. Retrieved 2023-10-22.
  2. ↑ Kenworthy, Matthew; Lock, Simon; Kennedy, Grant; van Capelleveen, Richelle; Mamajek, Eric; Carone, Ludmila; Hambsch, Franz-Josef; Masiero, Joseph; Mainzer, Amy; Kirkpatrick, J. Davy; Gomez, Edward; Leinhardt, Zoë; Dou, Jingyao; Tanna, Pavan; Sainio, Arttu (October 2023). "A planetary collision afterglow and transit of the resultant debris cloud". Nature. 622 (7982): 251–254. arXiv:2310.08360. Bibcode:2023Natur.622..251K. doi:10.1038/s41586-023-06573-9. ISSN 1476-4687. PMID 37821589. S2CID 263833848.
  3. ↑ Marshall, Jonathan P.; Ertel, Steve; Kemper, Francisca; Burgo, Carlos del; Otten, Gilles P. P. L.; Scicluna, Peter; Zeegers, Sascha T.; Ribas, Álvaro; Morata, Oscar (August 2023). "Sudden Extreme Obscuration of a Sun-like Main-sequence Star: Evolution of the Circumstellar Dust around ASASSN-21qj". The Astrophysical Journal. 954 (2): 140. arXiv:2309.16969. Bibcode:2023ApJ...954..140M. doi:10.3847/1538-4357/ace629. ISSN 0004-637X.
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