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(119951) 2002 KX₁₄
	Hubble Space Telescope image of 2002 KX14 taken in 2006
Discovery
Discovered by	Michael E. Brown, Chad Trujillo
Discovery date	17 May 2002
Designations
MPC designation	(119951) 2002 KX14
Minor planet category	TNO; cubewano; plutino-like
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 3
Observation arc	10192 days (27.90 yr)
Earliest precovery date	31 May 1984
Aphelion	40.491 AU (6.0574 Tm)
Perihelion	37.244 AU (5.5716 Tm)
Semi-major axis	38.867 AU (5.8144 Tm)
Eccentricity	0.041762
Orbital period (sidereal)	242.32 yr (88506.6 d)
Average orbital speed	4.77 km/s
Mean anomaly	261.303°
Mean motion	0° 0m 14.643s / day
Inclination	0.40348°
Longitude of ascending node	286.686°
Time of perihelion	≈ 30 May 2085; ±13 days
Argument of perihelion	71.686°
Earth MOID	36.2388 AU (5.42125 Tm)
Jupiter MOID	32.2786 AU (4.82881 Tm)
Physical characteristics
Dimensions	496±9×230±27 km
Mean diameter	393±19 km; 365+30; −21 km; 455±27 km; 415±1 km (chord)
Synodic rotation period	9–11 h
Geometric albedo	0.097+0.014; −0.013
Temperature	≈45 K
Apparent magnitude	20.4 (opposition)
Absolute magnitude (H)	4.862±0.038, 4.6

(119951) 2002 KX₁₄ (provisional designation 2002 KX₁₄) is a medium-sized trans-Neptunian object (TNO) residing within the Kuiper belt. It was discovered on 17 May 2002 by Michael E. Brown and Chad Trujillo.^[1]

It has a semi-major axis, orbital period and orbital eccentricity close to that of a plutino.^[10] The orbital periods of plutinos cluster around 247.2 years (1.5 times Neptune's orbital period), close to 2002 KX₁₄'s orbital period. However, 2002 KX₁₄ is not a plutino, as it is not actually in a resonance with Neptune, and it may have formed near its present nearly circular orbit lying almost perfectly on the ecliptic. This TNO may have remained dynamically cold since its formation, and thus its orbit may not have been a direct result of significant perturbations from Neptune during its migration to the outer solar system. The Deep Ecliptic Survey (DES) currently classifies it as a cubewano (classical) based on a 10-million-year integration of the orbit.^[2]

2002 KX₁₄ comes to opposition in late May at an apparent magnitude of 20.4.^[8]^[9] This makes it about 360 times fainter than Pluto.^[11]

References

^ ^a ^b ^c ^d "JPL Small-Body Database Browser: 119951 (2002 KX14)". (last obs). 26 April 2006. Retrieved 7 April 2016.
^ ^a ^b ^c Marc W. Buie (26 April 2006). "Orbit Fit and Astrometric record for 119951". SwRI (Space Science Department). Archived from the original on 20 May 2011.
^ JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
^ "(119951) 2002 KX14 2020 May 26". euraster.net. Euraster. 26 May 2020. Retrieved 19 September 2020.
^ Kretlow, Mike; Sicardy, Bruno; Santos-Sanz, Pablo; Ortiz, Jose L.; Desmars, Josselin; Morales, Nicolás; et al. (September 2021). The May 26, 2020 multi-chord stellar occultation by the trans-Neptunian object (119951) 2002 KX14 (PDF). 15th Europlanet Science Congress 2021. Europlanet Society. Bibcode:2021EPSC...15..520K. doi:10.5194/epsc2021-520. EPSC2021-520. Retrieved 26 June 2022.
^ ^a ^b ^c Alvarez-Candal, A.; Ortiz, J. L.; Morales, N.; Jiménez-Teja, Y.; Duffard, R.; Sicardy, B.; et al. (November 2014). "Stellar occultation by (119951) 2002 KX14 on April 26, 2012". Astronomy & Astrophysics. 571 (A48): 8. Bibcode:2014A&A...571A..48A. doi:10.1051/0004-6361/201424648. Archived from the original on 10 March 2016.
^ ^a ^b ^c Vilenius, E.; Kiss, C.; Mommert, M.; et al. (2012). ""TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel/PACS observations and thermal modeling of 19 classical Kuiper belt objects". Astronomy & Astrophysics. 541: A94. arXiv:1204.0697. Bibcode:2012A&A...541A..94V. doi:10.1051/0004-6361/201118743. S2CID 54222700.
^ ^a ^b "(119951) = 2002 KX14". minorplanetcenter.net. IAU Minor Planet Center. Retrieved 28 November 2022.
^ ^a ^b "HORIZONS Web-Interface". JPL Solar System Dynamics. Retrieved 20 July 2008.
^ John S. Lewis (2004). "Plutinos 2nd paragraph". Physics and Chemistry of the Solar System. Academic Press. p. 410. ISBN 978-0-12-446744-6.
^ (5th root of 100)^(20.4-14=363)