(55637) 2002 UX25

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The correct title of this article is (55637) 2002 UX₂₅. It features superscript or subscript characters that are substituted or omitted because of technical limitations.

**(55637) 2002 UX₂₅**
Discovery ^A

Discoverer	Spacewatch
Discovery date	October 30, 2002
Alternate designations ^B	none
Category	Trans-Neptunian object
Orbital elements ^C
Epoch June 14, 2006 (JD 2453900.5)
Eccentricity (e)	0.142
Semi-major axis (a)	6361.548 G m (42.524 AU)
Perihelion (q)	5459.840 Gm (36.497 AU)
Aphelion (Q)	7263.257 Gm (48.552 AU)
Orbital period (P)	101287.197 d (277.31 a)
Mean orbital speed	4.54 km/s
Inclination (i)	19.482°
Longitude of the ascending node (Ω)	204.637°
Argument of perihelion (ω)	278.775°
Mean anomaly (M)	281.399°
Physical characteristics ^D
Dimensions	838 km
Mass	7.9×10²⁰? kg
Density	2.0? g/cm³
Surface gravity	0.2543? m/s²
Escape velocity	0.4811? km/s
Rotation period	14.38 or 16.78 h
Spectral class	(red; B-V=1.12, V-R=0.61)
Absolute magnitude	3.482
Albedo (geometric)	0.09? (assumed)
Mean surface temperature	~43 K

(55637) 2002 UX₂₅ (also written as (55637) 2002 UX25) is a large Trans-Neptunian object discovered on October 30, 2002 by the Spacewatch program. It is a mid-sized (as 2002 TX₃₀₀ or (20000) Varuna) classical Kuiper Belt object (KBO).

A variability of the visual brightness was detected which could be fit to a period of 14.38 or 16.78 h (depending on a single-peaked or double peaked curve).

The object is redder than Varuna, unlike its neutral "twin" 2002 TX₃₀₀ in spite of similar size and orbit elements.

2002 UX₂₅ has a satellite. The orbit of this satellite has yet to be determined.

Image:(253) mathilde.jpg

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[edit] External links

Orbital simulation from JPL (Java)
MPEC 2002-V08
AstDys orbital elements

[edit] References

Rousselot, P.; Petit, J.-M.; Poulet, F.; Sergeev, A. Photometric study of Centaur (60558) 2000 EC₉₈ and trans-neptunian object (55637) 2002 UX₂₅ at different phase angles, Icarus, Volume 176, Issue 2, 2005 pp. 478-491.Abstract.

Minor planets
Previous minor planet	(55637) 2002 UX₂₅	Next minor planet

v • d • e</span>

Large trans-Neptunian objects

Kuiper belt: Orcus | Pluto (Charon) | Ixion | 2002 UX₂₅ | Varuna | 2002 TX₃₀₀ | 2003 EL₆₁ | Quaoar | 2005 FY₉ | 2002 AW₁₉₇

Scattered disc: 2002 TC₃₀₂ | Eris | 2004 XR₁₉₀ | Sedna

See also Triton, astronomical objects and the solar system's list of objects, sorted by radius or mass.
For pronunciation, see: Centaur and TNO pronunciation.

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For other objects and regions, see: asteroid groups and families, binary asteroids, asteroid moons and the Solar system For a complete listing, see: List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.

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Small bodies: Meteoroids · Asteroids (Asteroid belt) · Centaurs · TNOs (Kuiper belt/Scattered disc) · Comets (Oort cloud)
See also astronomical objects and the solar system's list of objects, sorted by radius or mass.