(131696) 2001 XT254

(131696) 2001 XT₂₅₄, provisionally known as 2001 XT₂₅₄, is a Kuiper belt object (KBO)^[2] that has a 3:7 resonance with Neptune.^[3]

(131696) 2001 XT₂₅₄

Discovery[1]
Discovered by	Sheppard, S. S., Kleyna, J., Jewitt, D. C.
Discovery date	9 December 2001
Designations
MPC designation	(131696) 2001 XT254
Minor planet category	SDO[2] 3:7 resonance[3][4]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	4113 days (11.26 yr)
Aphelion	70.889 AU (10.6048 Tm) (Q)
Perihelion	35.892 AU (5.3694 Tm) (q)
Semi-major axis	53.391 AU (7.9872 Tm) (a)
Eccentricity	0.32774 (e)
Orbital period (sidereal)	390.13 yr (142494 d)
Mean anomaly	359.98° (M)
Mean motion	0° 0m 9.095s / day (n)
Inclination	0.51687° (i)
Longitude of ascending node	359.55° (Ω)
Argument of perihelion	133.36° (ω)
Earth MOID	34.907 AU (5.2220 Tm)
Jupiter MOID	30.5705 AU (4.57328 Tm)
Physical characteristics
Dimensions	146 km (assumed)[5]
Geometric albedo	0.09 (assumed)
Absolute magnitude (H)	7.4[1]

2001 XT₂₅₄ came to perihelion in January 2016.^[1]

Assuming a generic TNO albedo of 0.09, it is about 146 km in diameter.^[5]

Resonance

Simulations by Emelʹyanenko and Kiseleva in 2007 show that 2001 XT₂₅₄ is librating in a 3:7 resonance with Neptune.^[6] This libration can be stable for less than 100 million to billions of years.^[6]

It has been observed 22 times over 4 oppositions.^[1]

The trefoil libration of 2001 XT₂₅₄. Jupiter in red, Saturn in yellow, and Uranus in blue. Neptune is the white dot at 5 o'clock.

The orbital period of 2001 XT₂₅₄ around the 3:7 (2.333..) resonance of Neptune.

See also

(95625) 2002 GX32, another TNO with a 3:7 resonance with Neptune.