(120348) 2004 TY₃₆₄

(120348) 2004 TY₃₆₄, provisionally known as 2004 TY₃₆₄, is a trans-Neptunian object. It is an inner classical Kuiper belt object in the definition by Gladman, Marsden, and Van Laerhoven (e<0.24).[2] Its inclination of almost 25 degrees disqualifies it as such in Marc Buie's definition.[3] It is also not listed as a scattered disc object by the Minor Planet Center.[8] It was discovered by Michael E. Brown, Chad Trujillo and David L. Rabinowitz on October 3, 2004 at the Palomar Observatory.

(120348) 2004 TY₃₆₄

Discovery
Discovered by	M. E. Brown C. Trujillo D. L. Rabinowitz
Discovery site	Palomar Obs.
Discovery date	3 October 2004
Designations
MPC designation	(120348) 2004 TY364
Minor planet category	TNO [1] · cubewano[2] SCATEXTD[3] Other[4]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	11834 days (32.40 yr)
Earliest precovery date	16 July 1983
Aphelion	41.384 AU (6.1910 Tm)
Perihelion	36.176 AU (5.4119 Tm)
Semi-major axis	38.780 AU (5.8014 Tm)
Eccentricity	0.067140
Orbital period	241.50 yr (88208.5 d)
Mean anomaly	265.93°
Mean motion	0° 0^m 14.692^s / day
Inclination	24.8499°
Longitude of ascending node	140.6141°
Time of perihelion	≈ 12 May 2079[5] ±6 days
Argument of perihelion	359.71°
Earth MOID	35.1896 AU (5.26429 Tm)
Jupiter MOID	30.8216 AU (4.61085 Tm)
Physical characteristics
Dimensions	512+37 −40 km[6]
Rotation period	11.70 h (0.488 d)[1]
Geometric albedo	0.107+0.020 −0.015[6]
Apparent magnitude	20.4[7]
Absolute magnitude (H)	4.520±0.070,[6] 4.8[1]

With an absolute magnitude of 4.5, it is likely a dwarf planet.[9] However, light-curve analysis has questioned whether it really is one.[10]

As of 2014, it is 39.2 AU from the Sun.[7]

References

1. "JPL Small-Body Database Browser: 120348 (2004 TY364)" (2005-09-01 last obs; arc: 22.13 years). Retrieved 7 April 2016.
2. Nomenclature in the outer Solar System
3. Marc W. Buie. "Orbit Fit and Astrometric record for 120348" (last observation: 2005-08-31 using 20 of 21 observations over 22 years). SwRI (Space Science Department). Retrieved 2014-11-13.
4. "MPEC 2010-S44 :Distant Minor Planets (2010 OCT. 11.0 TT)". IAU Minor Planet Center. 2010-09-25. Retrieved 2014-11-16.
5. JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
6. Lellouch, E.; Santos-Sanz, P.; Lacerda, P.; Mommert, M.; Duffard, R.; Ortiz, J. L.; Müller, T. G.; Fornasier, S.; Stansberry, J.; Kiss, Cs.; Vilenius, E.; Mueller, M.; Peixinho, N.; Moreno, R.; Groussin, O.; Delsanti, A.; Harris, A. W. (September 2013). ""TNOs are Cool": A survey of the trans-Neptunian region. IX. Thermal properties of Kuiper belt objects and Centaurs from combined Herschel and Spitzer observations" (PDF). Astronomy & Astrophysics. 557: A60. arXiv:1202.3657. Bibcode:2013A&A...557A..60L. doi:10.1051/0004-6361/201322047. Retrieved 7 November 2014.
7. "AstDys (120348) 2004TY364 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2009-12-10.
8. "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2014-11-13.
9. Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 2011-10-18. Retrieved 2011-08-25.
10. Gonzalo Tancredi & Sofía Favre (13 October 2008). "Dwarf Planet & Plutoid Headquarters". Portal Uruguayo de Astronomía. Retrieved 2010-09-22. (Which are the dwarfs in the Solar System?)

External links

• (120348) 2004 TY364 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters