Related Research Articles
Andrea Boattini is an Italian astronomer and a prolific discoverer of minor planets and comets.
Luciano Tesi is an Italian veterinarian, amateur astronomer, discoverer of many minor planets, and director of the San Marcello Pistoiese Observatory.
6Q0B44E, sometimes abbreviated to B44E, is a small object, probably an item of space debris, that is currently orbiting Earth outside the orbit of the Moon as of November 2018.
5011 Ptah is a near-Earth object and potentially hazardous asteroid of the Apollo group. It was discovered by astronomers with the Palomar–Leiden survey on 24 September 1960. The rare O-type asteroid on an eccentric orbit measures approximately 1.6 kilometers in diameter. It was named after the Ancient Egyptian deity Ptah.
4034 Vishnu is a rare-type asteroid classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 420 meters in diameter. It was discovered on 2 August 1986, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. It is named after the Hindu deity Vishnu.
Ivano Bertini is an Italian astronomer at the Parthenope University of Naples.
An interstellar object is an astronomical object in interstellar space that is not gravitationally bound to a star. This term can also be applied to an object that is on an interstellar trajectory but is temporarily passing close to a star, such as certain asteroids and comets. In the latter case, the object may be called an interstellar interloper.
2010 TK7 is a sub-kilometer Near-Earth asteroid and the first Earth trojan discovered; it precedes Earth in its orbit around the Sun. Trojan objects are most easily conceived as orbiting at a Lagrangian point, a dynamically stable location (where the combined gravitational force acts through the Sun's and Earth's barycenter) 60 degrees ahead of or behind a massive orbiting body, in a type of 1:1 orbital resonance. In reality, they oscillate around such a point. Such objects had previously been observed in the orbits of Mars, Jupiter, Neptune, and the Saturnian moons Tethys and Dione.
Fabrizio Bernardi is an Italian astronomer and discoverer of minor planets and comets, best known for the co-discovery of the near-Earth and potentially hazardous asteroid 99942 Apophis.
2009 BD is a very small asteroid, approximately 10 meters in diameter, which is classified as near-Earth object of the Apollo group and as an Earth co-orbital asteroid.
(549948) 2011 WL2 is a sub-kilometer asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group. It was discovered on 16 November 2011, by astronomers with the LINEAR at the Lincoln Laboratory ETS near Socorro, New Mexico, in the United States.
WT1190F was a small temporary satellite of Earth that impacted Earth on 13 November 2015 at 06:18:21.7 UTC. It is thought to have been space debris from the trans-lunar injection stage of the 1998 Lunar Prospector mission. It was first discovered on 18 February 2013 by the Catalina Sky Survey. It was then lost, and reacquired on 29 November 2013. It was again discovered on 3 October 2015 by astronomer Rose Garcia with the Catalina Sky Survey 60-inch telescope, and the object was soon identified to be the same as the two objects previously sighted by the team, who have been sharing their data through the International Astronomical Union's Minor Planet Center (MPC). An early orbit calculation showed that it was orbiting Earth in an extremely elliptical orbit, taking it from within the geosynchronous satellite ring to nearly twice the distance of the Moon. It was also probably the same object as 9U01FF6, another object on a similar orbit discovered on 26 October 2009.
The Sormano Astronomical Observatory is an astronomical observatory north of Milan, Italy. Located near the Swiss border at 1000 meters elevation at the mountain village of Sormano in the pre-Alps, the observatory was privately funded by the Gruppo Astrofili Brianza and built in 1986.
ʻOumuamua is the first interstellar object detected passing through the Solar System. Formally designated 1I/2017 U1, ʻOumuamua was discovered by Robert Weryk using the Pan-STARRS telescope at Haleakalā Observatory, Hawaii, on 19 October 2017, approximately 40 days after it passed its closest point to the Sun on 9 September. When it was first observed, it was about 33 million km from Earth, and already heading away from the Sun.
A hyperbolic asteroid is any sort of asteroid or non-cometary astronomical object observed to have an orbit not bound to the Sun and will have an orbital eccentricity greater than 1 when near perihelion. Unlike hyperbolic comets, they have not been seen out-gassing light elements, and therefore have no cometary coma. Most of these objects will only be weakly hyperbolic and will not be of interstellar origin.
Robert J. Weryk is a Canadian physicist and astronomer. He currently works at the University of Hawaii at Manoa where he discovered the first known interstellar object, ʻOumuamua. He has also published numerous articles on meteors and other astronomical topics.
2I/Borisov, originally designated C/2019 Q4 (Borisov), is the first observed rogue comet and the second observed interstellar interloper after ʻOumuamua. It was discovered by the Crimean amateur astronomer and telescope maker Gennadiy Borisov on 29 August 2019 UTC.
594913 ꞌAylóꞌchaxnim (provisional designation 2020 AV2) is a large near-Earth asteroid discovered by the Zwicky Transient Facility on 4 January 2020. It is the first asteroid discovered to have an orbit completely within Venus's orbit, and is thus the first and only known member of the eponymous ꞌAylóꞌchaxnim (informally named Vatira before its discovery) population of Atira-class asteroids. ꞌAylóꞌchaxnim has the smallest known aphelion and third-smallest known semi-major axis among all asteroids. With an absolute magnitude approximately 16.2, the asteroid is expected to be larger than 1 km in diameter.
(614689) 2020 XL5 is a near-Earth asteroid and Earth trojan discovered by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii on 12 December 2020. It oscillates around the Sun–Earth L4 Lagrangian point (leading 60°), one of the dynamically stable locations where the combined gravitational force acts through the Sun's and Earth's barycenter. Analysis of 2020 XL5's trojan orbit stability suggests it will remain around Earth's L4 point for at least four thousand years until gravitational perturbations from repeated close encounters with Venus destabilize its trojan configuration. With a diameter about 1.2 km (0.75 mi), 2020 XL5 is the second Earth trojan discovered, after 2010 TK7, and is the largest of its kind known.
2019 XS is a small Apollo near-Earth asteroid discovered on 2 December 2019 by the Mount Lemmon Survey in Arizona, United States. It passed 1.493 lunar distances from Earth on 9 November 2021 at 03:48 UTC, after which observations were checked by the International Asteroid Warning Network for timing and astrometric accuracy. During the close pass, the asteroid trailed across the far Southern Hemisphere to the Northern Hemisphere and reached a peak apparent magnitude of 13. A total of 957 observations were collected by Minor Planet Center as part of the International Asteroid Warning Network's campaign.
References
- 1 2 "10277 Micheli (1981 EC27)". Minor Planet Center. Retrieved 8 June 2021.
- ↑ Micheli, Marco (2013). Exploring connections between near-Earth objects and meteoroid streams (PhD). University of Hawaiʻi. ProQuest 1512644675.
- ↑ Micheli, Marco (22 June 2020). "La sfida di impedire che gli asteroidi colpiscano la Terra" (in Italian). Giornale di Brescia . Retrieved 10 December 2020.
- ↑ Cipolloni, Daniela (1 March 2011). "Record: 19 asteroidi scoperti in una notte" (in Italian). INAF . Retrieved 6 November 2016.
- ↑ Micheli, Marco (27 June 2018). "Non-gravitational acceleration in the trajectory of 1I/2017 U1 ('Oumuamua)". Nature . 559 (7713): 223–226. Bibcode:2018Natur.559..223M. doi:10.1038/s41586-018-0254-4. PMID 29950718. S2CID 49477508.
- ↑ "Delusione! 'Oumuamua è "solo" una cometa". 27 June 2018. Retrieved 28 June 2018.
- ↑ Ramponi, Loris (4 January 2023). "Un bresciano scopre un asteroide e lo regala alla madre per dirle grazie" (in Italian). Giornale di Brescia.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 8 June 2021.
