(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
Discovered by Spacewatch
Discovery date October 30, 2002
Designations
MPC designation (55637) 2002 UX25
Alternative names none
Minor planet
category		 Trans-Neptunian object
Epoch June 14, 2006 (JD 2453900.5)
Aphelion 7263.257 Gm (48.552 AU)
Perihelion 5459.840 Gm (36.497 AU)
Semi-major axis 6361.548 Gm (42.524 AU)
Eccentricity 0.142
Orbital period 101287.197 d (277.31 a)
Average orbital speed 4.54 km/s
Mean anomaly 281.399°
Inclination 19.482°
Longitude of ascending node 204.637°
Argument of perihelion 278.775°
Physical characteristics
Dimensions 681 +116/-114 [1]
Mass 7.9×1020? kg
Mean density 2.0? g/cm³
Equatorial surface gravity 0.2543? m/s²
Escape velocity 0.4811? km/s
Sidereal rotation
period		 14.38 or 16.78 h
Albedo 0.09? (assumed)
Temperature ~43 K
Spectral type (red; B-V=1.12, V-R=0.61)
Absolute magnitude 3.482

(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).

Contents

[edit] Brightness and Color

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).[2]

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

[edit] Sattellites

(55637) 2002 UX25 has one know satellite.

[edit] Satellite

The discovery of a satellite of 2002 UX25 was reported in IAUC 8812 on 22 February 2007. The orbit of this satellite has yet to be determined. The satellite was found at 0.16 arcsec from the primary with magnitude difference of 2.5.[3] Assuming a similar albedo the magnitude suggests a diameter of 205 ± 55 km.[1]

[edit] External links

[edit] References

  1. ^ Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) [Preprint arXiv]
  2. ^ 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, 176, (2005) pp. 478-491.Abstract.
  3. ^ Distant EKO The Kuiper Belt Electronic newsletter, March 2007


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