6090 Aulis,provisional designation:1989 DJ, is aJupiter trojan from theGreek camp, approximately 70 kilometers (43 miles) in diameter. It was discovered on 27 February 1989, by Belgian astronomerHenri Debehogne atESO'sLa Silla Observatory in northern Chile.^[1] The dark Jovianasteroid belongs to the50 largest Jupiter trojans and has arotation period of 18.5 hours.^[10] It was named for the ancient Greek portAulis, mentioned in theIliad.^[2]

Aulis is a dark Jovianasteroid orbiting in the leading Greek camp at Jupiter'sL₄Lagrangian point, 60° ahead of the Gas Giant's orbit in a1:1 resonance(seeTrojans in astronomy). It is also a non-family asteroid in theJovian background population.^[5]

It orbits the Sun at a distance of 5.0–5.6 AU once every 12 years and 3 months (4,470 days;semi-major axis of 5.31 AU). Its orbit has aneccentricity of 0.06 and aninclination of 20° with respect to theecliptic.^[3] The body'sobservation arc begins with aprecovery taken atPalomar Observatory in March 1954, almost 35 years prior to its official discovery observation.^[1]

Thisminor planet wasnumbered on 19 September 1994 (M.P.C. 23964).^[11] On 14 May 2021, the object was named by theWorking Group for Small Bodies Nomenclature (WGSBN) for the ancient Greek portAulis, mentioned in theIliad. In Greek mythology, it was the place where the Greek fleet gathered to set off forTroy and where KingAgamemnon had sacrificed his daughterIphigenia.^[2]

Aulis is an assumedC-type asteroid. ItsV–I color index of 0.98 is typical for that of most JovianD-types, the dominantspectral type among the larger Jupiter trojans.^[10]

Italian astronomerStefano Mottola obtained two concurring rotationallightcurves fromphotometric observations. In June 1994, together with astronomer Anders Erikson, he constructed a lightcurve from observations made with the0.9-meter Dutch telescope at La Silla, showing arotation period of18.60±0.05 hours and a brightness variation of0.09±0.01magnitude (U=2+). In September 2009, he used the 1.2-meter reflector atCalar Alto Observatory, Spain, and measured a refined period of18.476±0.007 hours with an amplitude of0.16±0.01 in magnitude (U=2+), confirming his previous result.^[9][10]

According to the space-based surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Aulis measures between 59.57 and 81.92 kilometers in diameter and its surface has analbedo between 0.046 and 0.087.^[6][7][8] TheCollaborative Asteroid Lightcurve Link adopts an albedo of 0.0553 from IRAS, and derives a similar diameter of 74.53 kilometers based on anabsolute magnitude of 9.4.^[9]

• Asteroid Lightcurve Database (LCDB), query form (infoArchived 16 December 2017 at theWayback Machine)
• Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
• Asteroid (6090) 1989 DJ at the Small Bodies Data Ferret
• 6090 Aulis atAstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 6090 Aulis at theJPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Jupiter trojans (Greek camp)
• Discoveries by Henri Debehogne
• Named minor planets
• Astronomical objects discovered in 1989

• Articles with short description
• Short description is different from Wikidata
• Use dmy dates from June 2018
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