(12929) 1999 TZ1
Discovery [1] | |
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Discovered by | C. W. Juels |
Discovery site | Fountain Hills Obs. |
Discovery date | 2 October 1999 |
Designations | |
MPC designation | (12929) 1999 TZ1 |
1999 TZ1 · 1992 CF6 | |
Jupiter trojan [1][2] Trojan [3] · background [4] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 64.68 yr (23,624 d) |
Aphelion | 5.4426 AU |
Perihelion | 5.0325 AU |
5.2376 AU | |
Eccentricity | 0.0392 |
11.99 yr (4,378 d) | |
213.65° | |
0° 4m 55.92s / day | |
Inclination | 43.453° |
200.23° | |
130.28° | |
Jupiter MOID | 0.0947 AU |
TJupiter | 2.4490 |
Physical characteristics | |
Mean diameter |
±5 km 51.5[5] ±0.62 km 54.08[6] ±4.04 km 55.34[7] |
±0.0016 h 9.2749[8] | |
±0.012 0.053[5] ±0.011 0.066[6] ±0.017 0.110[7] | |
C (assumed)[9] B–V = ±0.060 0.830[10] V–R = ±0.040 0.460[10] V–I = ±0.031 0.880[9] | |
9.30[7] ±0.025 9.792(R)[5] 9.9[1][2][6] | |
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(12929) 1999 TZ1, provisional designation 1999 TZ1, is a dark Jupiter trojan from the Trojan camp, approximately 54 kilometers (34 miles) in diameter. It was discovered on 2 October 1999, by American astronomer Charles W. Juels at the Fountain Hills Observatory in Arizona.[1] Originally considered a centaur, this now re-classified Jovian asteroid has a rotation period of 9.3 hours and belongs to the 80 largest Jupiter trojans.[9] It has not been named since its numbering in December 1999.[11]
Orbit and classification
1999 TZ1 is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's L5 Lagrangian point, 60° behind its orbit .[3] It is also a non-family asteroid of the Jovian background population.[4]
It orbits the Sun at a distance of 5.0–5.4 AU once every 11 years and 12 months (4,378 days; semi-major axis of 5.24 AU). Its orbit has an eccentricity of 0.04 and a high inclination of 43° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at Palomar Observatory in September 1953, or 46 years prior to its official discovery observation at Fountain Hills.[1]
Classification as centaur
1999 TZ1 was originally listed by the Minor Planet Center (MPC) as a centaur. However, its location close to L5, its low albedo and spectral slope, as well as its estimated dynamical lifetime of more than a billion years, led to the conclusion that the formerly classified centaur is indeed a Jupiter trojan.[5]
Physical characteristics
1999 TZ1 is an assumed C-type asteroid. It has a V–I color index of 0.88.[9]
Rotation period
In 2007, four rotational lightcurves of 1999 TZ1 have been obtained from photometric observations with a period of 10.4 and 10.422 hours (U=2/2/2/2-).[5][12][13][14] Best-rated lightcurve, obtained by Stefano Mottola at the Calar Alto Observatory over seven nights from May to June 2009, gave a rotation period of ±0.0016 hours with a brightness amplitude of 0.17 9.2749magnitude (U=2+).[8][9]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, and observations by French and Spanish astronomers, 1999 TZ1 measures between 51.5 and 55.34 kilometers in diameter and its surface has an albedo between 0.053 and 0.110.[5][6][7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of a carbonaceous asteroid 0.057 and calculates a diameter of 61.04 kilometers based on an absolute magnitude of 9.8.[9]
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Numbering and naming
This minor planet was numbered by the MPC on 22 December 1999 (M.P.C. 22480).[11] As of 2018, it has not been named.[1]
References
- 1 2 3 4 5 6 "12929 (1999 TZ1)". Minor Planet Center. Retrieved 19 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 12929 (1999 TZ1)" (2018-05-22 last obs.). Jet Propulsion Laboratory. Retrieved 19 June 2018.
- 1 2 "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 19 June 2018.
- 1 2 "Asteroid (12929) 1999 TZ1 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 19 June 2018.
- 1 2 3 4 5 6 Moullet, A.; Lellouch, E.; Doressoundiram, A.; Ortiz, J. L.; Duffard, R.; Morbidelli, A.; et al. (May 2008). "Physical and dynamical properties of (12929) 1999 TZ{1} suggest that it is a Trojan" (PDF). Astronomy and Astrophysics. 483 (2): L17–L20. Bibcode:2008A&A...483L..17M. doi:10.1051/0004-6361:200809474. Retrieved 19 June 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 19 June 2018. (online catalog)
- 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 19 June 2018. (online, AcuA catalog p. 153)
- 1 2 Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 32. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170. Retrieved 19 June 2018.
- 1 2 3 4 5 6 "LCDB Data for (12929)". Asteroid Lightcurve Database (LCDB). Retrieved 19 June 2018.
- 1 2 Chatelain, Joseph P.; Henry, Todd J.; French, Linda M.; Winters, Jennifer G.; Trilling, David E. (June 2016). "Photometric colors of the brightest members of the Jupiter L5 Trojan cloud". Icarus. 271: 158–169. Bibcode:2016Icar..271..158C. doi:10.1016/j.icarus.2016.01.026. Retrieved 9 June 2018.
- 1 2 "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 June 2018.
- ↑ Perna, Davide; Dotto, E.; Barucci, A.; Rossi, A.; de Bergh, C.; Doressoundiram, A.; et al. (September 2008). "Light Curves and Densities of Centaurs and Trans-Neptunian Objects from the ESO Large Program". American Astronomical Society. 40: 483. Bibcode:2008DPS....40.4708P. Retrieved 19 June 2018.
- ↑ Dotto, E.; Perna, D.; Barucci, M. A.; Rossi, A.; de Bergh, C.; Doressoundiram, A.; et al. (November 2008). "Rotational properties of Centaurs and Trans-Neptunian Objects. Lightcurves and densities". Astronomy and Astrophysics. 490 (2): 829–833. Bibcode:2008A&A...490..829D. doi:10.1051/0004-6361:200809615. Retrieved 19 June 2018.
- ↑ Thirouin, A.; Ortiz, J. L.; Duffard, R.; Santos-Sanz, P.; Aceituno, F. J.; Morales, N. (November 2010). "Short-term variability of a sample of 29 trans-Neptunian objects and Centaurs" (PDF). Astronomy and Astrophysics. 522: 43. arXiv:1004.4841. Bibcode:2010A&A...522A..93T. doi:10.1051/0004-6361/200912340. Retrieved 19 June 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- Asteroid (12929) 1999 TZ1 at the Small Bodies Data Ferret
- (12929) 1999 TZ1 at AstDyS-2, Asteroids—Dynamic Site
- (12929) 1999 TZ1 at the JPL Small-Body Database