Gliese 504

Gliese 504 (alternately 59 Virginis) is 57 lightyears from the Solar system.^[1] Its stellar type is G0. It is 22 percent larger than Sol, our sun, and twice as bright.^[2]

It is orbited by a brown dwarf, Gliese 504 b.^[3]

Astronomers have discussed the age of the star system. There are certain indications it is a young star. But its brown dwarf companion seems to be billions of years old. One explanation is that the apparent youth of the star can be explained by it absorbing some large planets.^[4]

References

↑ Alicia Cermak (2013-08-04). "Finding GJ504 in the night sky". NASA Science. Archived from the original on 2026-04-08. Retrieved 2026-07-14. It orbits the G0-type star GJ 504, which is slightly hotter than the sun and is faintly visible to the unaided eye in the constellation Virgo. The star lies 57 light-years away and the team estimates the system is about 160 million years old, based on methods that link the star's color and rotation period to its age.
↑ "★ Star 59 Virginis". Stellar Catalog. Retrieved 2026-07-14.
↑ Alicia Cermak (2019-04-22). "GJ 504 b". NASA Science. Archived from the original on 2026-06-28. Retrieved 2026-07-14. If we could travel to this giant planet, we would see a world still glowing from the heat of its formation with a color reminiscent of a dark cherry blossom, a dull magenta.
↑ S. Bellotti; C Pezzotti; G. Buldgen; A.A.V. Vidotto; D. Evensberget; E. Magaudda (2026-02-26). "Eating planets makes you younger: The magnetic dynamo rejuvenation of GJ 504 by planetary engulfment". Astronomy and Astrophysics. 707. doi:10.48550/arXiv.2602.22979. Archived from the original on 2026-07-14. Retrieved 2026-07-14. Between the two scenarios, only the planetary engulfment can explain the observational constraints obtained previously in the literature, such as the stellar rotation and X-ray luminosity, and the J̇ we derived and rescaled to account for underestimated magnetic field strength. More than one of |website= and |journal= specified (help)

[NASA-Science-2013-08-04-1] Alicia Cermak (2013-08-04). "Finding GJ504 in the night sky". NASA Science. Archived from the original on 2026-04-08. Retrieved 2026-07-14. It orbits the G0-type star GJ 504, which is slightly hotter than the sun and is faintly visible to the unaided eye in the constellation Virgo. The star lies 57 light-years away and the team estimates the system is about 160 million years old, based on methods that link the star's color and rotation period to its age.

[StellarCatalogGliese504-2] "★ Star 59 Virginis". Stellar Catalog. Retrieved 2026-07-14.

[NASA-Science-2019-04-22-3] Alicia Cermak (2019-04-22). "GJ 504 b". NASA Science. Archived from the original on 2026-06-28. Retrieved 2026-07-14. If we could travel to this giant planet, we would see a world still glowing from the heat of its formation with a color reminiscent of a dark cherry blossom, a dull magenta.

[AstronomyAndAstrophysics-2026-02-26-4] S. Bellotti; C Pezzotti; G. Buldgen; A.A.V. Vidotto; D. Evensberget; E. Magaudda (2026-02-26). "Eating planets makes you younger: The magnetic dynamo rejuvenation of GJ 504 by planetary engulfment". Astronomy and Astrophysics. 707. doi:10.48550/arXiv.2602.22979. Archived from the original on 2026-07-14. Retrieved 2026-07-14. Between the two scenarios, only the planetary engulfment can explain the observational constraints obtained previously in the literature, such as the stellar rotation and X-ray luminosity, and the J̇ we derived and rescaled to account for underestimated magnetic field strength. More than one of |website= and |journal= specified (help)

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