(144897) 2004 UX10

(144897) 2004 UX₁₀ (provisional designation 2004 UX₁₀) is a Kuiper-belt object. It has a diameter of about 360 kilometres (220 mi)^[5] and was discovered by Andrew Becker, Andrew Puckett and Jeremy Kubica on 20 October 2004 at Apache Point Observatory in Sunspot, New Mexico.^[2] The object is classified as a cubewano.^[3][4] It is near a 2:3 resonance with Neptune.^[5][7]

(144897) 2004 UX₁₀

Discovery[1]
Discovered by	A. C. Becker A. W. Puckett J. Kubica
Discovery site	Apache Point Obs.
Discovery date	20 October 2004
Designations
MPC designation	(144897) 2004 UX10
Minor planet category	TNO[2] · cubewano[3][4]
Orbital characteristics[2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2
Observation arc	65.21 yr (23,818 days)
Aphelion	40.591 AU
Perihelion	37.152 AU
Semi-major axis	38.871 AU
Eccentricity	0.0442
Orbital period (sidereal)	242.35 yr (88,520 days)
Mean anomaly	102.254°
Mean motion	0° 0m 14.76s / day
Inclination	9.5316°
Longitude of ascending node	147.90°
Argument of perihelion	149.15°
Physical characteristics
Dimensions	361+124 −94 km[5] 398±39 km[5][6]
Mass	> ≈ 3×1019 kg
Mean density	> 1.21 g/cm3[7]
Equatorial surface gravity	> 0.06 m/s2
Equatorial escape velocity	> 0.15 km/s
Synodic rotation period	7.58±0.05 h[8]
Geometric albedo	0.141+0.044 −0.031[5]
Spectral type	B–V =0.95±0.02 V–R = 0.58±0.05[5]
Apparent magnitude	20.6[9]
Absolute magnitude (H)	4.75±0.16[5] 4.4[2]

Orbit and rotation

Based on an integration of its motion over 10 million years, (144897) 2004 UX₁₀ has been classified as a classical Kuiper belt object (cubewano).^[3] It is near a 2:3 resonance with Neptune.^[5] The object is currently at 39 AU from the Sun.^[9]

The rotational period of (144897) 2004 UX₁₀ is 7.58 hours.^[8]

Physical properties

The size of (144897) 2004 UX₁₀ was measured by the Herschel Space Telescope to be 361+124
−94 km.^[5] The mass of the object is currently unknown but should be greater than about 3×10¹⁹ kg.^[7]

(144897) 2004 UX₁₀ has a moderately red slope in the visible spectral range. Its visible spectrum does not show any features, although there is a small departure from the linearity near 0.8 μm.^[10]

See also

• (145451) 2005 RM43
• 145452 Ritona
• (145453) 2005 RR43
• (248835) 2006 SX368