Discovery [1] [2] | |
---|---|
Discovered by | LINEAR |
Discovery site | Lincoln Lab ETS |
Discovery date | 3 February 2001 |
Designations | |
(98943) 2001 CC21 | |
1982 VE13 [1] | |
NEO · Apollo | |
Orbital characteristics [3] | |
Epoch 25 February 2023 ( JD 2460000.5) | |
Uncertainty parameter 0 | |
Observation arc | 40.31 yr (14,725 days) |
Earliest precovery date | 10 November 1982 |
Aphelion | 1.259 AU |
Perihelion | 0.806 AU |
1.032 AU | |
Eccentricity | 0.2192 |
1.05 yr (383.1 d) | |
280.856 ° | |
0° 56m 23.328s / day | |
Inclination | 4.807° |
75.519° | |
179.441° | |
Earth MOID | 0.08303 AU (12,421,000 km) |
Physical characteristics | |
329+78 −41 m ( NEOWISE) [4] 420–560 m ( polarimetry) [5] | |
5.0247±0.0001 h [6] [7] | |
0.285±0.083 [5] | |
S | |
18.77 [3] [1] | |
(98943) 2001 CC21 ( provisional designation 2001 CC21) is a stony near-Earth asteroid of the Apollo group, with a diameter of about 500 metres (1,600 feet). It was discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) survey at Socorro, New Mexico on 3 February 2001. [1] It is an upcoming flyby target of JAXA's Hayabusa2 extended mission, which will approach less than 100 km (62 mi) from the asteroid in July 2026. [8] [9]
This asteroid was discovered on 3 February 2001 by the Lincoln Near-Earth Asteroid Research project near Socorro, New Mexico and given the provisional designation 2001 CC21. [1] JAXA held a public naming campaign for the asteroid from December 2023 to May 2024, and a name will be selected in summer 2024. [10]
Near-infrared spectroscopy of 2001 CC21 in 2023 shows that it is a stony S-type asteroid composed of silicates, with traces of pyroxene on its surface. These findings disprove earlier suggestions of an L-type asteroid spectrum, which lack pyroxene absorption bands by contrast. [5]
2001 CC21's rotation period was first measured through photometric light curves in January 2002, which showed a periodicity of 5.02 hours. [7] Observations in 2003 and 2022 secured this period and refined it to 5.0247±0.0001 hours. [11] [6] 2001 CC21 significantly varies in brightness by 0.8–1.1 magnitudes as it rotates, which indicates it has an elongated shape. [6] [9]
In September 2020, a mission extension for JAXA's Hayabusa2 asteroid sample return probe was selected to do additional flybys of two near-Earth asteroids: 2001 CC21 in July 2026 and a rendezvous with 1998 KY26 in July 2031. [8] [9] Hayabusa2 will flyby within 100 km (62 mi) of 2001 CC21 at a very high relative speed of 5 km/s (3.1 mi/s), which will pose a challenge for the spacecraft's navigation and tracking capabilities during the encounter. [9]
Discovery [1] [2] | |
---|---|
Discovered by | LINEAR |
Discovery site | Lincoln Lab ETS |
Discovery date | 3 February 2001 |
Designations | |
(98943) 2001 CC21 | |
1982 VE13 [1] | |
NEO · Apollo | |
Orbital characteristics [3] | |
Epoch 25 February 2023 ( JD 2460000.5) | |
Uncertainty parameter 0 | |
Observation arc | 40.31 yr (14,725 days) |
Earliest precovery date | 10 November 1982 |
Aphelion | 1.259 AU |
Perihelion | 0.806 AU |
1.032 AU | |
Eccentricity | 0.2192 |
1.05 yr (383.1 d) | |
280.856 ° | |
0° 56m 23.328s / day | |
Inclination | 4.807° |
75.519° | |
179.441° | |
Earth MOID | 0.08303 AU (12,421,000 km) |
Physical characteristics | |
329+78 −41 m ( NEOWISE) [4] 420–560 m ( polarimetry) [5] | |
5.0247±0.0001 h [6] [7] | |
0.285±0.083 [5] | |
S | |
18.77 [3] [1] | |
(98943) 2001 CC21 ( provisional designation 2001 CC21) is a stony near-Earth asteroid of the Apollo group, with a diameter of about 500 metres (1,600 feet). It was discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) survey at Socorro, New Mexico on 3 February 2001. [1] It is an upcoming flyby target of JAXA's Hayabusa2 extended mission, which will approach less than 100 km (62 mi) from the asteroid in July 2026. [8] [9]
This asteroid was discovered on 3 February 2001 by the Lincoln Near-Earth Asteroid Research project near Socorro, New Mexico and given the provisional designation 2001 CC21. [1] JAXA held a public naming campaign for the asteroid from December 2023 to May 2024, and a name will be selected in summer 2024. [10]
Near-infrared spectroscopy of 2001 CC21 in 2023 shows that it is a stony S-type asteroid composed of silicates, with traces of pyroxene on its surface. These findings disprove earlier suggestions of an L-type asteroid spectrum, which lack pyroxene absorption bands by contrast. [5]
2001 CC21's rotation period was first measured through photometric light curves in January 2002, which showed a periodicity of 5.02 hours. [7] Observations in 2003 and 2022 secured this period and refined it to 5.0247±0.0001 hours. [11] [6] 2001 CC21 significantly varies in brightness by 0.8–1.1 magnitudes as it rotates, which indicates it has an elongated shape. [6] [9]
In September 2020, a mission extension for JAXA's Hayabusa2 asteroid sample return probe was selected to do additional flybys of two near-Earth asteroids: 2001 CC21 in July 2026 and a rendezvous with 1998 KY26 in July 2031. [8] [9] Hayabusa2 will flyby within 100 km (62 mi) of 2001 CC21 at a very high relative speed of 5 km/s (3.1 mi/s), which will pose a challenge for the spacecraft's navigation and tracking capabilities during the encounter. [9]