What is 5145 Pholus?
{{Infobox Planet | bgcolour=#FFFFC0 | name=5145 Pholus | discoverer=[[Spacewatch]]<br /> ([[David L. Rabinowitz]]) | discovered=January 9, 1992 | alt_names=1992 AD | mp_category=[[Centaur (planetoid)|Centaur]], [[Asteroid]] |orbit_ref = <ref name=jpldata/> | epoch=November 30, 2008 ([[Julian day|JD]] 2454800.5) | semimajor=3045.2 [[Giga|G]]m<br />(20.356 [[Astronomical unit|AU]]) | perihelion=1305.9 Gm<br />(8.730 AU) | aphelion=4784.1 Gm<br />(31.98 AU) | eccentricity=0.5711 | period=33547.41 [[day|d]]<br />(91.85 [[Julian year (astronomy)|yr]]) | inclination=24.65[[degree (angle)|°]] | asc_node=119.44° | arg_peri=354.92° | mean_anomaly=67.49° | avg_speed=6.01 km/[[second|s]] | dimensions=185±16 km <ref name=adsabs/> | mass=~6.6{{e|18}} [[kilogram|kg]] | density=2.0? g/[[cubic centimetre|cm³]] (assumed) | surface_grav=~0.052 m/s² | escape_velocity=~0.098 km/s | rotation=9.98 hours<ref name=jpldata>{{cite web |date=May 27, 2008 |title=JPL Small-Body Database Browser: 5145 Pholus (1992 AD) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Pholus |access-date=September 1, 2008}}</ref> | spectral_type= (red) B-V=1.19; V-R=0.78 <ref>{{cite web |url=http://www.physics.nau.edu/~tegler/research/survey.htm |title=Kuiper Belt Object Magnitudes and Surface Colors |access-date=November 5, 2006 |last=Tegler |first=Stephen C. |date=January 26, 2006 |archive-date=September 8, 2012 |archive-url=https://web.archive.org/web/20120908120608/http://www.physics.nau.edu/~tegler/research/survey.htm |url-status=dead }}</ref> | abs_magnitude=7.0<ref name=jpldata/> | albedo=0.046±0.02 | single_temperature=~62 [[kelvin|K]]}} '''5145 Pholus''' is a [[Centaur (planetoid)|Centaur]] (minor planetoid) of the [[solar system]] running in a stretched [[orbit]], with a [[perihelion]] (closest approach to the [[Sun]]) less than [[Saturn (planet)|Saturn's]] and [[aphelion]] (farthest approach from the Sun) farther than [[Neptune (planet)|Neptune's]]. Close approaches of the object are not common: it has not come within