8405 Asbolus

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=8405 Asbolus


caption = Artist's impression of 8405 Asbolus
discoverer=J. V. Scotti and R. Jedicke
discovered=April 5, 1995
alt_names=1995 GO
mp_category=centaur
orbit_ref = cite web
date=2008-02-26 last obs
title=JPL Small-Body Database Browser: 8405 Asbolus (1995 GO)
url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Asbolus
accessdate=2008-09-03]
epoch=November 30, 2008 (JD 2454800.5)
semimajor=18.07 AU
perihelion=6.843 AU
aphelion=29.31 AU
eccentricity=0.6214
period=76.88 yr
inclination=17.61
asc_node=6.0
arg_peri=290.4
mean_anomaly=29.6
avg_speed=?
dimensions=76 kmcite web
date=22 August 2008
title=List of Known Trans-Neptunian Objects
publisher=Johnston's Archive
author=Wm. Robert Johnston
url=http://www.johnstonsarchive.net/astro/tnoslist.html
accessdate=2006-12-17]
mass=?
density=?
surface_grav=?
escape_velocity=?
rotation= 8.87 hr
spectral_type=?
abs_magnitude=9.0
albedo=0.12±0.03cite journal
last=Fernández |first= Yanga R.
coauthors=Jewitt, David C.; Sheppard, Scott S.
title=Thermal Properties of Centaurs Asbolus and Chiron
journal=The Astronomical Journal
volume=112 |issue=2 |pages=1050–1055 |year=2002
doi=10.1086/338436
url=http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2002AJ....123.1050F&db_key=AST&high=3d6ea7529520107
accessdate=2004-10-06 ]
single_temperature=

8405 Asbolus (pronEng|ˈæzbələs, from _gr. "Άσβολος") is a centaur, that is, an icy asteroid that orbits between Jupiter and Neptune. It was discovered by James V. Scotti and Robert Jedicke of Spacewatch at Kitt Peak Observatory on April 5, 1995. It is named after Asbolus (Greek for "sooty"), a centaur in Greek mythology. Its provisional designation was 1995 GO.

Crater

Asbolus is about 76 km in diameter. No resolved images of it have ever been made but, in 1998, spectral analysis of its composition by the Hubble Space Telescope revealed a fresh impact crater on its surface, less than 10 million years old.cite web
date=September 14, 2000
title=Centaur's Bright Surface Spot Could be Crater of Fresh Ice
publisher=Hubblesite (STScI-2000-31)
url=http://hubblesite.org/newscenter/archive/releases/2000/31/text/
accessdate=2004-04-12] Centaurs are dark in colour, because their icy surfaces have darkened after long exposure to solar radiation and the solar wind. However, fresh craters excavate more reflective ice from below the surface, and that is what Hubble has detected on Asbolus.

Orbit

Centaurs have short dynamical lives due to strong interactions with the giant planets. Asbolus is estimated to have an orbital half-life of about 860 kiloannum.cite journal
last=Horner |first= J.
coauthors=Evans, N.W.; Bailey, M. E.
title=Simulations of the Population of Centaurs I: The Bulk Statistics
year=2004
url=http://arxiv.org/abs/astro-ph?papernum=0407400
accessdate=2008-09-01 ]

References

External links

* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Asbolus;orb=1;view=Far Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=Asbolus Ephemeris]

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