Carl Ingebretsen
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View article: Apache Point Rapid Response Characterization of Primitive Imminent Impactor 2024 RW<sub>1</sub>
Apache Point Rapid Response Characterization of Primitive Imminent Impactor 2024 RW<sub>1</sub> Open
Imminent impactors may be detected only a few hours before their impact with Earth, providing a brief opportunity to characterize them before impact. We describe the characterization of imminent impactor 2024 RW 1 , which was discovered by…
View article: Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS
Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS Open
On 2025 July 1st the third interstellar object, 3I/ATLAS or C/2025 N1 (ATLAS), was discovered, with an eccentricity of e = 6.15 ± 0.01 and perihelion of q = 1.357 ± 0.001 au. We report our initial visible to near-infrared (420–1000 nm) spe…
View article: Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS
Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS Open
On July 1st 2025 the third interstellar object, 3I/ATLAS or C/2025 N1 (ATLAS), was discovered, with an eccentricity of $e=6.15 \pm 0.01$ and perihelion of $q=1.357\pm0.001$ au. We report our initial visible to near-infrared (420-1000 nm) s…
View article: Interstellar comet 3I/ATLAS: discovery and physical description
Interstellar comet 3I/ATLAS: discovery and physical description Open
We present the characteristics of interstellar comet 3I/Asteroid Terrestrial-impact Last Alert System (ATLAS), discovered on 2025 July 1 by the ATLAS. The comet has eccentricity $\simeq$6.1 and velocity at infinity $\simeq$57 km s−1, indic…
View article: Apache Point rapid response characterization of primitive imminent impactor 2024 RW$_1$
Apache Point rapid response characterization of primitive imminent impactor 2024 RW$_1$ Open
Imminent impactors may be detected only a few hours before their impact with Earth, providing a brief opportunity to characterize them before impact. We describe the characterization of imminent impactor 2024 RW$_1$, which was discovered b…
View article: The Discovery and Characterization of Minimoon 2024 PT<sub>5</sub>
The Discovery and Characterization of Minimoon 2024 PT<sub>5</sub> Open
Minimoons are asteroids that become temporarily captured by the Earth–Moon system. We present the discovery of 2024 PT 5 , a minimoon discovered by the Asteroid Terrestrial-impact Last Alert System Sutherland telescope on 2024 August 7. Th…