(84522) 2002 TC302

(84522) 2002 TC₃₀₂
	Hubble Space Telescope image of 2002 TC302 taken in 2005
Discovery
Discovered by	M. E. Brown; C. A. Trujillo; D. L. Rabinowitz
Discovery site	Palomar Obs.
Discovery date	9 October 2002
Designations
MPC designation	(84522) 2002 TC302
Minor planet category	TNO · 2:5 resonant; distant
Orbital characteristics
	Epoch 1 July 2021 (JD 2459396.5)
	Uncertainty parameter 2 · 3
Observation arc	20.49 yr (7,484 d)
Earliest precovery date	5 August 2000
Aphelion	71.382 AU
Perihelion	39.169 AU
Semi-major axis	55.275 AU
Eccentricity	0.2914
Orbital period (sidereal)	410.97 yr (150,105 d)
Mean anomaly	327.19°
Mean motion	0° 0m 8.64s / day
Inclination	34.993°
Longitude of ascending node	23.801°
Time of perihelion	14 December 2058
Argument of perihelion	86.312°
Physical characteristics
Dimensions	543±18 × 460±11 km (projected area)
Mean diameter	500±14 km (area equiv.); 584.1+105.6; −88.0 km (thermal)
Synodic rotation period	56.1 h
Geometric albedo	0.147; 0.115+0.047; −0.033
Spectral type	IR (moderately red); B–V=1.03; V–R=0.67
Apparent magnitude	20.5
Absolute magnitude (H)	3.94; 4.23; 4.17±0.10

(84522) 2002 TC₃₀₂ (provisional designation 2002 TC₃₀₂) is a mid-sized trans-Neptunian object located in the outermost region of the Solar System. It was discovered on 9 October 2002, by American astronomers Mike Brown, Chad Trujillo and David Rabinowitz at the Palomar Observatory in California.^[1] The resonant trans-Neptunian object stays in a 2:5 resonance with Neptune. It has a reddish color, a rotation period of 56.1 hours and measures at least 500 kilometers (310 miles) in diameter.

^ ^a ^b ^c ^d ^e ^f Cite error: The named reference MPC-object was invoked but never defined (see the help page).
^ Cite error: The named reference MPEC2002-V26 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference jpldata was invoked but never defined (see the help page).
^ Cite error: The named reference Buie-DES was invoked but never defined (see the help page).
^ Cite error: The named reference johnstonsarchive-TNOs was invoked but never defined (see the help page).
^ ^a ^b ^c ^d ^e Cite error: The named reference Ortiz-2020 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Fornasier-2013 was invoked but never defined (see the help page).
^ Cite error: The named reference spitzer was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference color was invoked but never defined (see the help page).

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[MPC-object-1] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference MPC-object was invoked but never defined (see the help page).

[MPEC2002-V26-2] Cite error: The named reference MPEC2002-V26 was invoked but never defined (see the help page).

[jpldata-3] Cite error: The named reference jpldata was invoked but never defined (see the help page).

[Buie-DES-4] Cite error: The named reference Buie-DES was invoked but never defined (see the help page).

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[Ortiz-2020-7] Cite error: The named reference Ortiz-2020 was invoked but never defined (see the help page).

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Discovery^[1]^[2]
Hubble Space Telescope image of 2002 TC₃₀₂ taken in 2005
Discovered by	M. E. Brown C. A. Trujillo D. L. Rabinowitz
Discovery site	Palomar Obs.
Discovery date	9 October 2002
Designations
MPC designation	(84522) 2002 TC₃₀₂
Minor planet category	TNO^[3] · 2:5 resonant^[4]^[5] distant^[1]
Orbital characteristics^[3]
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 2^[3] · 3^[1]
Observation arc	20.49 yr (7,484 d)
Earliest precovery date	5 August 2000
Aphelion	71.382 AU
Perihelion	39.169 AU
Semi-major axis	55.275 AU
Eccentricity	0.2914
Orbital period (sidereal)	410.97 yr (150,105 d)
Mean anomaly	327.19°
Mean motion	0° 0^m 8.64^s / day
Inclination	34.993°
Longitude of ascending node	23.801°
Time of perihelion	14 December 2058^[a]
Argument of perihelion	86.312°
Physical characteristics
Dimensions	543±18 × 460±11 km (projected area)^[6]
Mean diameter	500±14 km (area equiv.)^[6] 584.1+105.6 −88.0 km (thermal)^[7]
Synodic rotation period	56.1 h^[6]
Geometric albedo	0.147^[6] 0.115+0.047 −0.033^[7]
Spectral type	IR (moderately red)^[8] B–V=1.03^[9] V–R=0.67^[9]
Apparent magnitude	20.5^[1]
Absolute magnitude (H)	3.94^[3]^[1] 4.23^[6] 4.17±0.10^[7]