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(144897) 2004 Ux10

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Title: (144897) 2004 Ux10  
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Subject: Plutino, List of minor planets/144801–144900, List of classical Kuiper belt objects
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(144897) 2004 Ux10

(144897) 2004 UX10
Discovered by AC Becker, A.W. Puckett, J. Kubica
Discovery date 20 October 2004
Minor planet category plutino[1][2]
Orbital characteristics[3]
Epoch 2456600.5 (4 November 2013)
Aphelion 40.654 AU
Perihelion 37.568 AU
Semi-major axis 39.111 AU
Eccentricity 0.03945
Orbital period 244.60 yr (89339 d)
Mean anomaly 86.80°
Inclination 9.53669°
Longitude of ascending node 148.0323°
Argument of perihelion 156.86°
Physical characteristics
Dimensions 361.0+124.2
Mass > ≈3×1019 kg
Mean density >1.21 g/cm3[4]
Equatorial surface gravity >0.06 m/s2
Escape velocity >0.15 km/s
Sidereal rotation period 5–7 hours[4]
Albedo 0.141+0.044
Spectral type 0.95 ± 0.02
0.58 ± 0.05[2]
Apparent magnitude 20.6[5]
Absolute magnitude (H) 4.75 ± 0.16[2]

(144897) 2004 UX10 is a Kuiper-belt object. It has a diameter of about 398 km.[2] It was discovered on 20 October 2004.[3] The object is a plutino (in 2:3 resonance with Neptune).[1][2][4]

Mike Brown's website lists it as a likely dwarf planet based on its absolute magnitude (H) and assumed albedo.[6]

Orbit and rotation

2004 UX10 is a plutino in 2:3 resonance with Neptune. This fact was established by integrating its motion over 10 million years.[2] The object is currently at 39 AU from the Sun.[5]

The rotational period of 2004 UX10 is not known but is likely to lie in the range from 5 to 7 hours.[4]

Physical properties

The size of 2004 UX120 was measured by the Herschel Space Telescope to be 361.0+124.2
 km.[2] The mass of the object is currently unknown but should be greater than about 3×1019 kg.[4]

2004 UX120 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.[7]


External links

  • Chart Trajectory by JPL (software needs JAVA)

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