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2005 TN53

Neptune trojan

Field	Value
minorplanet	yes
name
background	#C7FF8F
discovery_ref
discovered	7 October 2005
(discovery: first observation only)
discoverer	{{Ubl
discovery_site	Las Campanas Obs.
mpc_name
mp_category	{{Hlist
<ref name	"MPC-NeptuneTrojans" /
centaur<ref name	"jpldata" /
distant<ref name	"MPC-2005TN53" /
orbit_ref
epoch	21 November 2025 (JD 2461000.5)
uncertainty	4
observation_arc	8.00 yr (2,921 days)
aphelion	32.451 AU
perihelion	28.154 AU
semimajor	30.303 AU
eccentricity	0.0709
period	166.81 yr (60,928 days)
mean_anomaly	301.81°
mean_motion	/ day
inclination	24.989°
asc_node	9.280°
arg_peri	85.696°
dimensions	{{Ubl
68 km <ref name	"h" /
80 km<ref name	"Planetary-Society" /
magnitude	23.7
abs_magnitude	9.0

(discovery: first observation only) | C. Trujillo | S. S. Sheppard | Neptune trojan | | centaur | distant | 68 km (est. at 0.10) | 80 km **** is an inclined Neptune trojan leading Neptune's orbit in the outer Solar System, approximately 80 kilometers in diameter. It was first observed on 7 October 2005, by American astronomers Scott Sheppard and Chad Trujillo at Las Campanas Observatory in the Atacama desert of Chile. It was the third such body to be discovered, and the first with a significant orbital inclination, which showed that the population as a whole is very dynamically excited.

Orbit and classification

Neptune trojans are resonant trans-Neptunian objects (TNO) in a 1:1 mean-motion orbital resonance with Neptune. These Trojans have a semi-major axis and an orbital period very similar to Neptune's (30.10 AU; 164.8 years).

belongs to the larger group, which leads 60° ahead Neptune's orbit. It orbits the Sun with a semi-major axis of 30.014 AU at a distance of 28.1–31.9 AU once every 164 years and 5 months (60,059 days). Its orbit has an eccentricity of 0.06 and an inclination of 25° with respect to the ecliptic.

It has the same orbital period as Neptune and orbits at the Lagrangian point about 60° ahead of Neptune. It has an inclination of 25 degrees.

Physical characteristics

Diameter

The discoverers estimate that has a mean-diameter of 80 kilometers based on a magnitude of 23.7. Based on a generic magnitude-to-diameter conversion, it measures approximately 68 kilometers in diameter using an absolute magnitude of 9.0 and an assumed albedo of 0.10.

Numbering and naming

Due to its orbital uncertainty, this minor planet has not been numbered and its official discoverers have not been determined. If named, it will follow the naming scheme already established with 385571 Otrera, which is to name these objects after figures related to the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek.

References

AstDys-2 about

References

(10 April 2018). "DIVISION F / Working Group for Small Body Nomenclature Working Group for Small Body Nomenclature. THE TRIENNIAL REPORT (2015 Sept 1 - 2018 Feb 15)". IAU.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

neptune-trojans minor-planet-object-articles-(unnumbered) discoveries-by-chad-trujillo discoveries-by-scott-s.-sheppard discoveries-at-las-campanas-observatory astronomical-objects-discovered-in-2005

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