(13366) 1998 US24
Discovery [1] | |
---|---|
Discovered by | LONEOS |
Discovery site | Anderson Mesa |
Discovery date | 18 October 1998 |
Designations | |
MPC designation | (13366) 1998 US24 |
1998 US24 · 1996 RX29 | |
Jupiter trojan [1][2] Greek [3] · background [4] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 64.27 yr (23,476 d) |
Aphelion | 5.7685 AU |
Perihelion | 4.6895 AU |
5.2290 AU | |
Eccentricity | 0.1032 |
11.96 yr (4,367 d) | |
193.23° | |
0° 4m 56.64s / day | |
Inclination | 6.6365° |
96.296° | |
355.47° | |
Jupiter MOID | 0.3771 AU |
TJupiter | 2.9760 |
Physical characteristics | |
Mean diameter | ±2.87 km 33.30[5] |
±105 h 400[6] | |
±0.016 0.058[5] | |
C (assumed)[7] | |
11.10[5] 11.2[1][7] 11.3[2] | |
|
(13366) 1998 US24, provisional designation 1998 US24, is a Jupiter trojan from the Greek camp, approximately 33 kilometers (21 miles) in diameter. It was discovered on 18 October 1998, by astronomers with the Lowell Observatory Near-Earth-Object Search at the Anderson Mesa Station near Flagstaff, Arizona, in the United States.[1] The dark Jovian asteroid is a slow rotator with a long rotation period of potentially 400 hours.[7] It has not been named since its numbering in January 2000.[8]
Orbit and classification
1998 US24 is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's L4 Lagrangian point, 60° ahead of its orbit .[3] It is also a non-family asteroid in the Jovian background population.[4] It orbits the Sun at a distance of 4.7–5.8 AU once every 11 years and 12 months (4,367 days; semi-major axis of 5.23 AU). Its orbit has an eccentricity of 0.10 and an inclination of 7° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at Palomar Observatory in February 1954, more than 44 years prior to its official discovery observation at Anderson Mesa.[1]
Numbering and naming
This minor planet was numbered by the MPC on 24 January 2000 (M.P.C. 37586).[8] As of 2018, it has not been named.[1]
Physical characteristics
1998 US24 is an assumed C-type asteroid, while most larger Jupiter trojans are D-types.[7]
Rotation period
In August 2015, a first rotational lightcurve of 1998 US24 was obtained from photometric observations by the Kepler space telescope during its K2 mission. Lightcurve analysis gave a rotation period of ±105 hours with a brightness variation of 0.23 400magnitude (U=2-).[6] One month later, a second, lower-rated lightcurve by Kepler determined an alternative period of ±36 hours with an amplitude of 0.20 ( 522U=1+).[9] As of 2018, no secure period of this slow rotator has yet been obtained.[7]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 1998 US24 measures 33.30 kilometers in diameter and its surface has an albedo of 0.058,[5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 32.03 kilometers based on an absolute magnitude of 11.2.[7]
|
|
References
- 1 2 3 4 5 6 "13366 (1998 US24)". Minor Planet Center. Retrieved 4 July 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 13366 (1998 US24)" (2018-05-21 last obs.). Jet Propulsion Laboratory. Retrieved 4 July 2018.
- 1 2 "List of Jupiter Trojans". Minor Planet Center. 1 July 2018. Retrieved 4 July 2018.
- 1 2 "Asteroid (13366) 1998 US24 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 4 July 2018.
- 1 2 3 4 Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 4 July 2018. (online catalog)
- 1 2 Szabó, Gy. M.; Pál, A.; Kiss, Cs.; Kiss, L. L.; Molnár, L.; Hanyecz, O.; et al. (March 2017). "The heart of the swarm: K2 photometry and rotational characteristics of 56 Jovian Trojan asteroids" (PDF). Astronomy and Astrophysics. 599: 13. arXiv:1609.02760. Bibcode:2017A&A...599A..44S. doi:10.1051/0004-6361/201629401. Retrieved 4 July 2018.
- 1 2 3 4 5 6 "LCDB Data for (13366)". Asteroid Lightcurve Database (LCDB). Retrieved 4 July 2018.
- 1 2 "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 July 2018.
- ↑ Ryan, Erin Lee; Sharkey, Benjamin N. L.; Woodward, Charles E. (March 2017). "Trojan Asteroids in the Kepler Campaign 6 Field". The Astronomical Journal. 153 (3): 12. Bibcode:2017AJ....153..116R. doi:10.3847/1538-3881/153/3/116. Retrieved 4 July 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- Asteroid (13366) 1998 US24 at the Small Bodies Data Ferret
- (13366) 1998 US24 at AstDyS-2, Asteroids—Dynamic Site
- (13366) 1998 US24 at the JPL Small-Body Database