2025 GN1

2025 GN₁
Discovery
Discovered by	CTIO-DECam
Discovery site	Cerro Tololo Inter-American Observatory
Discovery date	4 April 2025
Designations
Minor planet category	Near-Earth Object
Orbital characteristics
	Uncertainty parameter 4
Semi-major axis	0.4619717 AU
Mean anomaly	291.35714°
Mean motion	3.138924°/day
Inclination	32.83617°
Earth MOID	0.22452 AU
Mercury MOID	0.12435 AU
Venus MOID	0.02718 AU
Physical characteristics
Absolute magnitude (H)	20.06

Last updated October 28, 2025

2025GN₁ is a near-Earth asteroid discovered by the Cerro Tololo-DECam on 4 April 2025. It is noted for its extreme short orbit period around the Sun (113 days).

Orbit

2025 GN₁ has an orbit very similar to 2021 PH₂₇, which has the shortest orbital period around the Sun (also 113 days). This similarity gave rise to a hypothesis, that 2025 GN₁ is a pair asteroid of 2021 PH₂₇. The two objects might have formed as fragments of a larger parent after a close encounter with Venus 11,000 years ago. 2025 GN₁ is expected to fly close to Venus in 2,300 years, possibly even impacting the planet.^[1]

References

↑ Sheppard, Scott S.; Hsieh, Henry H.; Pokorný, Petr; Tholen, David J.; Thirouin, Audrey; Contreras, Carlos; Mora, Marcelo D.; Martinez, Mauricio; Toro, Ivonne (2025-06-30). "Colors and Dynamics of a Near-Sun Orbital Asteroid Family: 2021 PH27 and 2025 GN1". The Astrophysical Journal Letters. 987 (1): L18. arXiv: 2504.16175 . Bibcode:2025ApJ...987L..18S. doi: 10.3847/2041-8213/ade3da . ISSN 2041-8205.

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[1] Sheppard, Scott S.; Hsieh, Henry H.; Pokorný, Petr; Tholen, David J.; Thirouin, Audrey; Contreras, Carlos; Mora, Marcelo D.; Martinez, Mauricio; Toro, Ivonne (2025-06-30). "Colors and Dynamics of a Near-Sun Orbital Asteroid Family: 2021 PH27 and 2025 GN1". The Astrophysical Journal Letters. 987 (1): L18. arXiv: 2504.16175 . Bibcode:2025ApJ...987L..18S. doi: 10.3847/2041-8213/ade3da . ISSN 2041-8205.

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