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Line 1: + − + − | 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=May 26, 2004+ − |title=JPL Small-Body Database Browser: 7066 Nessus (1993 HA2)+ − |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Nessus+ − |access-date=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]]+ − − | 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=https://arxiv.org/abs/astro-ph/0702538v2 − |year=2007 − |access-date=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 − |access-date=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}}. + − + − − 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. − |author2=Evans, N.W.|author3=Bailey, M. E. − |title=Simulations of the Population of Centaurs I: The Bulk Statistics − |year=2004 − |url=https://arxiv.org/abs/astro-ph?papernum=0407400 − |access-date=2008-09-01 }}</ref> + − − + − + − + Line 73:
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{{Infobox Planet | minorplanet = yes | bgcolour = #FFFFC0 |
{{Infobox Planet | minorplanet = yes | bgcolour = #FFFFC0 |
name=7066 Nessus
name=7066 Nessus
| 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=May 26, 2004
| title=JPL Small-Body Database Browser: 7066 Nessus (1993 HA2)
| url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Nessus
| access-date=September 5, 2008}}</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]]
| dimensions=60±16 km<ref name=spitzer>{{cite arXiv |last1=Stansberry |first1=John |last2=Grundy |first2=Will |last3=Brown |first3=Mike |last4=Cruikshank |first4=Dale |last5=Spencer |first5=John |last6=Trilling |first6=David |last7=Margot |first7=Jean-Luc |title=Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope |language=en |eprint=astro-ph/0702538 |date=20 February 2007}}</ref><ref name=johnston>{{cite web| date=August 22, 2008| title=List of Known Trans-Neptunian Objects| publisher=Johnston's Archive|author-first=Wm. Robert|author-last=Johnston| url=http://www.johnstonsarchive.net/astro/tnoslist.html| access-date=September 5, 2008}}</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 [[April 26]] [[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 ==
== 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]].
Nessus finishes one orbit around the [[Sun]] in 122.4 years, an [[Orbital eccentricity|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 |last1=Horner |first1=J. |last2=Evans |first2=N. W. |last3=Bailey |first3=M. E. |title=Simulations of the population of Centaurs – I. The bulk statistics |journal=Monthly Notices of the Royal Astronomical Society |date=1 November 2004 |volume=354 |issue=3 |pages=798–810 |doi=10.1111/j.1365-2966.2004.08240.x |s2cid=16002759 |url=https://doi.org/10.1111/j.1365-2966.2004.08240.x |accessdate=24 June 2022 |issn=0035-8711}}</ref>
== References ==
== References ==
{{Reflist}}
{{Reflist}}
== Other websites ==
== 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://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] {{Webarchive|url=https://web.archive.org/web/20041028164801/http://spacewatch.lpl.arizona.edu/nea.html |date=2004-10-28 }}
* [http://spacewatch.lpl.arizona.edu/nea.html Spacewatch] {{Webarchive|url=https://web.archive.org/web/20041028164801/http://spacewatch.lpl.arizona.edu/nea.html |date=October 28, 2004 }}
* [http://www.hohmanntransfer.com/cat/an02.htm Asteroid/Comet connection] {{Webarchive|url=https://web.archive.org/web/20060516111900/http://www.hohmanntransfer.com/cat/an02.htm |date=2006-05-16 }}
* [http://www.hohmanntransfer.com/cat/an02.htm Asteroid/Comet connection] {{Webarchive|url=https://web.archive.org/web/20060516111900/http://www.hohmanntransfer.com/cat/an02.htm |date=May 16, 2006 }}
* [http://www.centaurs.info/menu/index.htm?page=/menu/home.htm The Centaur Research Project]
* [http://www.centaurs.info/menu/index.htm?page=/menu/home.htm The Centaur Research Project] {{Webarchive|url=https://web.archive.org/web/20190923200403/http://www.centaurs.info/menu/index.htm?page=%2Fmenu%2Fhome.htm |date=2019-09-23 }}
* [http://www.zanestein.com/keywords.html#Nessus Astrological keywords for Nessus]
* [http://www.zanestein.com/keywords.html#Nessus Astrological keywords for Nessus]
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[[Category:Asteroids]]
[[Category:Asteroids]]
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