(55565) 2002 AW197

Infobox Planet
bgcolour=#FFFFC0
name=mp|(55565) 2002 AW|197


caption=dwarf planet candidate 2002 AW197 as taken by the Spitzer Space Telescope on 2004 April 13.
discovery=yes
discoverer=Michael E. Brown,
Eleanor F. Helin,
Michael Hicks,
Kenneth Lawrence,
Steven H. Pravdo,
Chad Trujillo
discovered=January 10, 2002
mp_name=mp|(55565) 2002 AW|197
alt_names="none"
mp_category=TNO (cubewano)
epoch=December 31, 2006 (JD 2 454 100.5)
semimajor=7 073.647 Gm (47.284 AU)
perihelion=6 143.329 Gm (41.066 AU)
aphelion=8 003.964 Gm (53.503 AU)
eccentricity=0.132
period=118 761.410 d (325.15 a)
inclination=24.410°
asc_node=297.513°
arg_peri=295.307°
mean_anomaly=281.945°
avg_speed=4.31 km/s
physical_characteristics=yes
dimensions=700±50 kmcite journal
last=Cruikshank |first= Dale P.
coauthors=Stansberry, John A.; Emery, Joshua P.; et.al.
title=The High-Albedo Kuiper Belt Object (55565) 2002 AW197
journal=The Astrophysical Journal
volume=624 |issue=1 |pages=L53-L56 |year=2005
doi=10.1086/430420
url=http://adsabs.harvard.edu/abs/2005ApJ...624L..53C
accessdate=2008-06-28 ]
940 kmciteweb
title=The Dwarf Planets
first=Michael E.|last=Brown
authorlink=Michael E. Brown
publisher=California Institute of Technology, Department of Geological Sciences
url=http://web.gps.caltech.edu/~mbrown/dwarfplanets/
accessdate=2008-06-28]
radius=
mass=5.2e|20? kg
density=2.0? g/cm³
surface_grav=0.2216? m/s²
escape_velocity=0.4192? km/s
sidereal_day=? d
spectral_type=?
magnitude = 19.9 (opposition)cite web
title=HORIZONS Web-Interface
publisher= [http://ssd.jpl.nasa.gov JPL Solar System Dynamics]
url=http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2002AW197
accessdate=2008-07-02]
abs_magnitude=3.27cite web
date=2005-01-16 last obs
title=JPL Small-Body Database Browser: 55565 (2002 AW197)
url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=55565
accessdate=2008-06-28]
albedo=0.17±0.03
single_temperature=~39–40 K mp|(55565) 2002 AW|197 is a trans-Neptunian object (TNO). It was discovered in 2002 by Michael E. Brown et al. It is classified as a cubewano.

It is one of the largest dwarf planet candidates and is located near the Kuiper cliff.

ize

Observations of thermal emissions by the Spitzer Space Telescope give a diameter of 700 ± 50 km and a large body albedo of 0.17 ± 0.03.

urface

ESO analysis of spectra reveals a strong red slope and no presence of water ice (in contrast to Quaoar, also red) suggesting organic material (see comparison of colours and typical composition inferred from spectra of the TNOs).

External links

* [http://hamilton.dm.unipi.it/cgi-bin/astdys/astibo?objects:2002AW197;main AstDys] orbital elements
* [http://neo.jpl.nasa.gov/cgi-bin/db?sstr=2002+AW197 Orbital simulation] from JPL (Java)

References

*Cruikshank, D., et al. "High Albedo KBO (55565)2002 AW₁₉₇", The Astronomical Journal Letters, 624,53 (May 2004). [http://www.boulder.swri.edu/ekonews/issues/past/n042/html/index.html Abstract]
*Doressoundiram, A.; Barucci, M. A.; Tozzi, G. P.; Poulet, F.; Boehnhardt, H.; de Bergh, C.; Peixinho, N. "Spectral characteristics and modeling of the trans-neptunian object (55565) 2002 AW197 and the Centaurs (55576) 2002 GB10 and (83982) 2002 GO9: ESO Large Program on TNOs and Centaurs". Planetary and Space Science, 53, Issue 14-15, p. 1501-1509 (2005). [http://adsabs.harvard.edu/abs/2005P&SS...53.1501D Abstract]