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{{Infobox Planet | minorplanet = yes | width = 25em | bgcolour = #FFFFC0 |
name=7066 Nessus
| discovery=yes
| discoverer=[[David L. Rabinowitz]]
| discovered=[[April 26]], [[1993]]
| alt_names={{mp|1993 HA|2}}
| mp_category=[[Centaur (planetoid)|Centaur]]
| orbit_ref=<ref name=jpldata>{{cite web
|date=2004-05-26 last obs
|title=JPL Small-Body Database Browser: 7066 Nessus (1993 HA2)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Nessus
|accessdate=2008-09-05}}</ref>
| epoch=[[December 31]], [[2006]] ([[Julian day|JD]] 2454100.5)
| semimajor=3688.309 [[Giga|G]]m (24.655 [[Astronomical unit|AU]])
| perihelion=1769.167 Gm (11.826 AU)
| aphelion=5607.451 Gm (37.483 AU)
| eccentricity=0.520
| period=44714.802 [[day|d]] (122.42 [[Julian year (astronomy)|a]])
| inclination=15.647[[degree (angle)|°]]
| asc_node=31.216°
| arg_peri=170.814°
| mean_anomaly=43.762°
| avg_speed=5.57 km/[[second|s]]
| physical_characteristics=yes
| dimensions=60±16 km<ref name=spitzer>{{cite web
|title=Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope
|author=John Stansberry, Will Grundy, Mike Brown, Dale Cruikshank, John Spencer, David Trilling, Jean-Luc Margot
|work=University of Arizona, Lowell Observatory, California Institute of Technology, NASA Ames Research Center, Southwest Research Institute, Cornell University
|url=http://arxiv.org/abs/astro-ph/0702538v2
|year=2007
|accessdate=2008-10-18}}</ref><ref name=johnston>{{cite 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=2008-09-05}}</ref>
| mass=~1.6{{e|17}} [[kilogram|kg]]
| density=2.0? g/[[cubic centimetre|cm³]]
| surface_grav=~0.0148 m/s²
| escape_velocity=~0.0280 km/s
| sidereal_day=? d
| axial_tilt=?° | pole_ecliptic_lat=? | pole_ecliptic_lon=?
| spectral_type=?
| abs_magnitude=9.6<ref name=jpldata/>
| albedo=0.06<ref name=spitzer/>
| single_temperature=~56 [[kelvin|K]]}}
'''7066 Nessus''' is a [[Centaur (planetoid)|centaur]] (a type of icy planetoid) that was found by [[David L. Rabinowitz]], working with [[Spacewatch]], at [[Kitt Peak]] on [[26 April]], [[1993]]. It was the second centaur found by him ([[5145 Pholus]] being his first), and the third centaur to be found ([[2060 Chiron]] was the first). It was officially announced on [[May 13]], [[1993]] in IAUC 5789 with designation {{mp|1993 HA|2}}.
== Orbit ==
Nessus finishes one orbit around the [[Sun]] in 122.4 years, an [[eccentricity]] of 0.52 and an inclination to the [[ecliptic]] of 15.6 degrees. At [[perihelion]] (closest approach to the Sun), it moves closer to the Sun than [[Uranus]], while at aphelion (farthest approach to the Sun) it goes even farther than[[Neptune]].
The orbits of centaurs change from time to time because of interactions with the giant planets. Nessus is thought to have a fairly long orbital half-life of about 4.9 [[Myr]].<ref name=Horner2004a>{{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 }}</ref>
== References ==
{{Reflist}}
== Other websites ==
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Nessus;orb=1;view=Far Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=Nessus Ephemeris]
* [http://spacewatch.lpl.arizona.edu/nea.html Spacewatch]
* [http://www.hohmanntransfer.com/cat/an02.htm Asteroid/Comet connection]
* [http://www.centaurs.info/menu/index.htm?page=/menu/home.htm The Centaur Research Project]
* an account of [http://www.zanestein.com/page4_2.htm the naming]
* [http://www.zanestein.com/nessus.htm Nessus in astrology]
* [http://www.zanestein.com/keywords.html#Nessus Astrological keywords for Nessus]
{{MinorPlanets Navigator|(7065) 1992 PU2|7067 Kiyose}}
{{MinorPlanets_Footer}}
{{DEFAULTSORT:Nessus}}
{{sci-stub}}
[[Category:Asteroids]]
name=7066 Nessus
| discovery=yes
| discoverer=[[David L. Rabinowitz]]
| discovered=[[April 26]], [[1993]]
| alt_names={{mp|1993 HA|2}}
| mp_category=[[Centaur (planetoid)|Centaur]]
| orbit_ref=<ref name=jpldata>{{cite web
|date=2004-05-26 last obs
|title=JPL Small-Body Database Browser: 7066 Nessus (1993 HA2)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Nessus
|accessdate=2008-09-05}}</ref>
| epoch=[[December 31]], [[2006]] ([[Julian day|JD]] 2454100.5)
| semimajor=3688.309 [[Giga|G]]m (24.655 [[Astronomical unit|AU]])
| perihelion=1769.167 Gm (11.826 AU)
| aphelion=5607.451 Gm (37.483 AU)
| eccentricity=0.520
| period=44714.802 [[day|d]] (122.42 [[Julian year (astronomy)|a]])
| inclination=15.647[[degree (angle)|°]]
| asc_node=31.216°
| arg_peri=170.814°
| mean_anomaly=43.762°
| avg_speed=5.57 km/[[second|s]]
| physical_characteristics=yes
| dimensions=60±16 km<ref name=spitzer>{{cite web
|title=Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope
|author=John Stansberry, Will Grundy, Mike Brown, Dale Cruikshank, John Spencer, David Trilling, Jean-Luc Margot
|work=University of Arizona, Lowell Observatory, California Institute of Technology, NASA Ames Research Center, Southwest Research Institute, Cornell University
|url=http://arxiv.org/abs/astro-ph/0702538v2
|year=2007
|accessdate=2008-10-18}}</ref><ref name=johnston>{{cite 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=2008-09-05}}</ref>
| mass=~1.6{{e|17}} [[kilogram|kg]]
| density=2.0? g/[[cubic centimetre|cm³]]
| surface_grav=~0.0148 m/s²
| escape_velocity=~0.0280 km/s
| sidereal_day=? d
| axial_tilt=?° | pole_ecliptic_lat=? | pole_ecliptic_lon=?
| spectral_type=?
| abs_magnitude=9.6<ref name=jpldata/>
| albedo=0.06<ref name=spitzer/>
| single_temperature=~56 [[kelvin|K]]}}
'''7066 Nessus''' is a [[Centaur (planetoid)|centaur]] (a type of icy planetoid) that was found by [[David L. Rabinowitz]], working with [[Spacewatch]], at [[Kitt Peak]] on [[26 April]], [[1993]]. It was the second centaur found by him ([[5145 Pholus]] being his first), and the third centaur to be found ([[2060 Chiron]] was the first). It was officially announced on [[May 13]], [[1993]] in IAUC 5789 with designation {{mp|1993 HA|2}}.
== Orbit ==
Nessus finishes one orbit around the [[Sun]] in 122.4 years, an [[eccentricity]] of 0.52 and an inclination to the [[ecliptic]] of 15.6 degrees. At [[perihelion]] (closest approach to the Sun), it moves closer to the Sun than [[Uranus]], while at aphelion (farthest approach to the Sun) it goes even farther than[[Neptune]].
The orbits of centaurs change from time to time because of interactions with the giant planets. Nessus is thought to have a fairly long orbital half-life of about 4.9 [[Myr]].<ref name=Horner2004a>{{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 }}</ref>
== References ==
{{Reflist}}
== Other websites ==
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Nessus;orb=1;view=Far Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=Nessus Ephemeris]
* [http://spacewatch.lpl.arizona.edu/nea.html Spacewatch]
* [http://www.hohmanntransfer.com/cat/an02.htm Asteroid/Comet connection]
* [http://www.centaurs.info/menu/index.htm?page=/menu/home.htm The Centaur Research Project]
* an account of [http://www.zanestein.com/page4_2.htm the naming]
* [http://www.zanestein.com/nessus.htm Nessus in astrology]
* [http://www.zanestein.com/keywords.html#Nessus Astrological keywords for Nessus]
{{MinorPlanets Navigator|(7065) 1992 PU2|7067 Kiyose}}
{{MinorPlanets_Footer}}
{{DEFAULTSORT:Nessus}}
{{sci-stub}}
[[Category:Asteroids]]