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1998 KY26 is a nearly spherical sub-kilometer asteroid, classified as a near-Earth object of the Apollo group. It measures approximately 30 meters (100 feet) in diameter and is a fast rotator, having a rotational period of only 10.7 minutes. It was first observed on 2 June 1998, by the Spacewatch survey at Kitt Peak National Observatory during 6 days during which it passed 800,000 kilometers (half a million miles) away from Earth (a little more than twice the Earth–Moon distance).
719 Albert, provisional designation 1911 MT, is a stony asteroid, approximately 2.5 kilometers in diameter, classified as a near-Earth object of the Amor group of asteroids. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 3 October 1911, and subsequently a lost minor planet for 89 years. The asteroid was named in memory of Albert Salomon Anselm von Rothschild, an Austrian philanthropist and banker. Albert was the second Amor asteroid discovered, the first being 433 Eros.
25143 Itokawa (provisional designation 1998 SF36) is a sub-kilometer near-Earth object of the Apollo group and a potentially hazardous asteroid. It was discovered by the LINEAR program in 1998 and later named after Japanese rocket engineer Hideo Itokawa. The peanut-shaped S-type asteroid has a rotation period of 12.1 hours and measures approximately 330 meters (1,100 feet) in diameter. Due to its low density and high porosity, Itokawa is considered to be a rubble pile, consisting of numerous boulders of different sizes rather than of a single solid body.
(52760) 1998 ML14, provisional designation 1998 ML14, is a stony asteroid, classified as near-Earth object of the Apollo group and potentially hazardous asteroid, approximately 1 kilometer in diameter. It was discovered on 24 June 1998, by the LINEAR survey at the Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico.
Hayabusa2 is an asteroid sample-return mission operated by the Japanese state space agency JAXA. It is a successor to the Hayabusa mission, which returned asteroid samples for the first time in June 2010. Hayabusa2 was launched on 3 December 2014 and rendezvoused in space with near-Earth asteroid 162173 Ryugu on 27 June 2018. It surveyed the asteroid for a year and a half and took samples. It left the asteroid in November 2019 and returned the samples to Earth on 5 December 2020 UTC. Its mission has now been extended through at least 2031, when it will rendezvous with the small, rapidly-rotating asteroid 1998 KY26.
3548 Eurybates is a carbonaceous Jupiter trojan from the Greek camp and the parent body of the Eurybates family, approximately 68 kilometers in diameter. It is a target to be visited by the Lucy mission in August 2027. Discovered during the second Palomar–Leiden Trojan survey in 1973, it was later named after Eurybates from Greek mythology. This C-type asteroid is among the 60 largest known Jupiter trojans and has a rotation period of 8.7 hours. Eurybates has one kilometer-sized satellite, named Queta, that was discovered in images taken by the Hubble Space Telescope in September 2018.
(153591) 2001 SN263 is a carbonaceous trinary asteroid, classified as near-Earth object and former potentially hazardous asteroid of the Amor group, approximately 2.6 kilometers (1.6 miles) in diameter. It was discovered by the Lincoln Near-Earth Asteroid Research project at Lincoln Lab's Experimental Test Site in Socorro, New Mexico, on 20 September 2001. The two synchronous minor-planet moons measure approximately 770 and 430 meters and have an orbital period of 16.46 and 150 hours, respectively.
7803 Adachi, provisional designation 1997 EW2, is a stony Agnia asteroid from the middle region of the asteroid belt, approximately 6.4 kilometers (4 miles) in diameter. The asteroid was discovered on 4 March 1997, by Japanese amateur astronomer Takao Kobayashi at the Ōizumi Observatory in central Japan. It was named for Japanese amateur astronomer Makoto Adachi. The S-type asteroid has a rotation period of 5.2 hours.
7505 Furusho, provisional designation 1997 AM2, is a stony asteroid and sizable Mars-crosser on an eccentric orbit from the asteroid belt, approximately 10 kilometers (6.2 miles) in diameter. It was discovered on 3 January 1997, by Japanese astronomer Takao Kobayashi at the Ōizumi Observatory in the Kantō region of Japan. The assumed S-type asteroid is likely elongated in shape and has a rotation period of 4.1 hours. It was named for Japanese astronomer Reiko Furusho.
7088 Ishtar, provisional designation 1992 AA, is a synchronous binary asteroid and near-Earth object from the Amor group, approximately 1.3 kilometers in diameter. It was discovered on 1 January 1992, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The relatively bright asteroid with an unknown spectral type has a rotation period of 2.7 hours. In December 2005, a 330-meter sized satellite was discovered, orbiting its primary every 20.65 hours.
162173 Ryugu (provisional designation 1999 JU3) is a near-Earth object and a potentially hazardous asteroid of the Apollo group. It measures approximately 900 metres (3,000 ft) in diameter and is a dark object of the rare spectral type Cb, with qualities of both a C-type asteroid and a B-type asteroid. In June 2018, the Japanese spacecraft Hayabusa2 arrived at the asteroid. After making measurements and taking samples, Hayabusa2 left Ryugu for Earth in November 2019 and returned the sample capsule to Earth on 5 December 2020. The samples showed the presence of organic compounds, such as uracil (one of the four components in RNA) and vitamin B3.
367943 Duende (provisional designation 2012 DA14) is a micro-asteroid and a near-Earth object of the Aten and Atira group, approximately 30 meters (98 ft) in diameter. It was discovered by astronomers of the Astronomical Observatory of Mallorca at its robotic La Sagra Observatory in 2012, and named for the duende, a goblin-like creature from Iberian and Filipino mythology and folklore. Duende is likely an uncommon L-type asteroid and significantly elongated. For an asteroid of its size, it has a relatively long rotation period of 9.485 hours.
(88710) 2001 SL9 (provisional designation 2001 SL9) is a sub-kilometer asteroid and binary system, classified as near-Earth object of Apollo group discovered by NEAT at Palomar Observatory on 18 September 2001. It measures approximately 960 meters in diameter, while its 2001-discovered minor-planet moon has an estimated diameter of 200 meters based on a secondary to primary mean-diameter ration of 0.28.
21900 Orus is a Jupiter trojan asteroid from the Greek camp, approximately 53 kilometers in diameter, and a target of the Lucy mission to be visited in November 2028. It is among the 100 largest Jupiter trojans and has a rotation period of 13.5 hours. It was discovered on 9 November 1999, by Japanese amateur astronomer Takao Kobayashi at his private Ōizumi Observatory in Gunma Prefecture, Japan, and later named Orus after a slain Achaean warrior from the Iliad.
(219774) 2001 YY145, provisional designation 2001 YY145 is a stony background asteroid and exceptionally slow rotator from the central region of the asteroid belt, approximately 1.5 kilometers (0.9 miles) in diameter. It was discovered on 18 December 2001, by astronomers with the Lowell Observatory Near-Earth-Object Search at Anderson Mesa Station near Flagstaff, Arizona, in the United States. The assumed S-type asteroid is likely elongated and has a rarely seen rotation period of 1007 hours, making it the 13th slowest rotator.
(163899) 2003 SD220 is a sub-kilometer asteroid and tumbling slow rotator, classified as near-Earth object and potentially hazardous asteroid of the Aten group, which orbit the Sun between Venus and Earth. Its orbital period of 0.75 years means that it orbits the Sun about 4 times for every 3 of the Earth. It was discovered on 29 September 2003, by astronomers of the Lowell Observatory Near-Earth-Object Search at Anderson Mesa Station near Flagstaff, Arizona.
(154276) 2002 SY50, provisional designation 2002 SY50, is a stony asteroid on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.1 kilometers (0.7 miles) in diameter. It was discovered on 30 September 2002, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The K-type asteroid has a rotation period of 4.8 hours. It will make a close encounter with Earth on 30 October 2071.
(172034) 2001 WR1, provisional designation: 2001 WR1, is a sub-kilometer near-Earth object of the Amor group, approximately 650 meters (2,100 feet) in diameter. The S-type asteroid has been identified as a potential flyby target of the Hayabusa2 mission. It was discovered on 17 November 2001, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The asteroid has a rotation period of 8.0 hours and possibly an elongated shape. It remains unnamed since its numbering in December 2007.
(481394) 2006 SF6 is a sub-kilometer near-Earth object and potentially hazardous asteroid of the Aten group, approximately 300 meters (1,000 feet) in diameter. It was discovered on 17 September 2006, by the Catalina Sky Survey at Catalina Station in Arizona. On 21 November 2019, it passed Earth at a distance of 11 lunar distances (0.0288 AU), which is the object's closest flyby for centuries. The stony A/S-type asteroid is highly elongated in shape and has a rotation period of 11.5 hours.
(231937) 2001 FO32 is a near-Earth asteroid classified as a potentially hazardous asteroid of the Apollo group. With an estimated diameter around 550 m (1,800 ft), it was discovered by the Lincoln Near-Earth Asteroid Research at Socorro, New Mexico on 23 March 2001. The asteroid safely passed by Earth on 21 March 2021 16:03 UTC from a closest approach distance of 0.0135 AU (2.02 million km; 1.25 million mi), or 5.25 lunar distances (LD). During the day before closest approach, 2001 FO32 reached a peak apparent magnitude of 11.7 and was visible to ground-based observers with telescope apertures of at least 20 cm (8 in). It is the largest and one of the fastest asteroids to approach Earth within 10 LD (3.8 million km; 2.4 million mi) in 2021.
References
- 1 2 3 4 "(98943) = 1982 VE13 = 2001 CC21". Minor Planet Center. Retrieved 6 April 2023.
- ↑ Spahr, Timothy B. (9 February 2001). "MPEC 2001-C19 : 2001 CC21". Minor Planet Electronic Circular. Minor Planet Center. 2001-C19. Bibcode:2001MPEC....C...19T . Retrieved 6 April 2023.
- 1 2 "Small-Body Database Lookup: 98943 (2001 CC21)" (2023-03-05 last obs.). Jet Propulsion Laboratory . Retrieved 6 April 2023.
- ↑ Wright, E.; Masiero, J.; Mainzer, A. (October 2023). Preliminary Thermophysical Modeling of NEOWISE data on the Hayabusa2# Flyby Target 2001 CC21. 55th Annual DPS Meeting Joint with EPSC. Vol. 55. San Antonio, Texas. 107.03.
- 1 2 3 Geem, Jooyeon; Ishiguro, Masateru; Granvik, Mikael; Naito, Hiroyuki; Akitaya, Hiroshi; Sekiguchi, Tomohiko; et al. (April 2023). "Spectral type and geometric albedo of (98943) 2001 CC21, the Hayabusa2# mission target". Monthly Notices of the Royal Astronomical Society: Letters. 525: L17–L21. arXiv: 2304.02917 . doi:10.1093/mnrasl/slad073.
- 1 2 3 "LCDB Data for (98943) 2001 CC21". Asteroid Lightcurve Database (LCDB). Collaborative Asteroid Lightcurve Link. Retrieved 6 April 2023.
- 1 2 Pravec, Petr. ""Prepublished" periods of asteroids". Ondrejov Asteroid Photometry Project. Astronomical Institute of the Czech Academy of Sciences. Retrieved 6 April 2023.
- 1 2 Hirabayashi, M.; Mimasu, Y.; Sakatani, N.; Watanabe, S.; Tsuda, Y.; Saiki, T.; et al. (August 2021). "Hayabusa2 extended mission: New voyage to rendezvous with a small asteroid rotating with a short period". Advances in Space Research. 68 (3): 1533–1555. arXiv: 2104.08660 . Bibcode:2021AdSpR..68.1533H. doi:10.1016/j.asr.2021.03.030. S2CID 233297066.
- 1 2 3 4 Yoshikawa, Makoto; Mimasu, Yuya; Tanaka, Satoshi; Hirabayashi, Masatoshi; Saiki, Takanao; Nakazawa, Satoru; Tsuda, Yuichi; et al. (3 April 2023). Hayabusa2 Extended Mission : Hayabusa2#. 8th IAA Planetary Defense Conference. Vienna, Austria. p. 15. Archived from the original on 7 April 2023.
- ↑ Ries, J. G.; Varadi, F.; Barker, E. S.; Shelus, P. J. (September 2006). Photometry of Near Earth Asteroids at McDonald Observatory (PDF). New Horizons in Astronomy: Frank N. Bash Symposium. Vol. 352. ASP Conference Series. p. 4. Bibcode:2006ASPC..352..273G.
