2013 ND 15

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Asteroid
2013 ND 15
Properties of the orbit ( animation )
Orbit type Venus Trojan (L 4 )
Aten asteroid
Mercury
orbit cruiser Venus orbit cruiser Earth orbit
cruiser
Major semi-axis 0.7235376  AU
eccentricity 0.6114845
Perihelion - aphelion 0.2811056 AU - 1.1659697 AU
Inclination of the orbit plane 4.7937958 °
Sidereal period 0.62 ± 0.0002 a
(224.796792 ± 0.069808 d )
Physical Properties
Medium diameter 0.042 km to 0.093 km
Albedo 0.04 to 0.20
Absolute brightness 24.1 mag
history
Explorer N. Primak
A. Schultz
T. Goggia
K. Chambers
Date of discovery July 13, 2013
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

The asteroid 2013 ND 15 is the first known Trojan horse from the planet Venus . However, the track is not stable for long.

Discovery and naming

2013 ND 15 was carried out on July 13, 2013 as part of a larger sky survey by Pan-STARRS , a system for continuous observation of the starry sky through 4 telescopes on Mauna Kea ( Hawaiʻi ) and Haleakalā ( Maui ), by a team of astronomers led by N. Primak, A. Schultz, T. Goggia and K. Chambers discovered with the Pan-STARRS-1 telescope on Haleakalā. The first image of the asteroid was taken on July 13, 2013.

Track properties

Orbit

2013 ND 15 encircles the sun on a prograde , highly elliptical orbit between 42,053,000 km (0.281 AE ) and 174,427,000 km (1.166 AE) distance from its center. The eccentricity of the orbit is 0.611, the orbit is inclined at 4.794 ° to the ecliptic . He is currently on the Lagrange point L 4 of the Sun-Venus system. In this position it runs ahead of Venus by 60 ° and describes a "tadpole-shaped" orbit around the L 4 point.

The major orbit half-axis of 108,239,700 km (0.723538 AU) is very similar to that of Venus with 108,208,000 km (0.723327), but the eccentricity is so high that the orbit of the asteroid is from within Mercury's orbit extends beyond the earth's orbit and thus crosses the orbits of three planets. In 2013, ND 15 belongs to the group of aten asteroids in addition to its status as a co- ordinate object .

The orbital period of 2013 ND 15 is 224 days, 19 hours, 7 minutes and 23 seconds. It therefore lasts about 2 hours and 18 minutes longer than that of Venus.

Railway resonance

2013 ND 15 shows a behavior of an orbital resonance or near-resonance with the planets Mercury, Venus and Earth. Its short-term orbital dynamic development differs from the other three known Venus co-orbitals (322756) 2001 CK 32 , (524522) 2002 VE 68 and 2012 XE 133 , which are classified as quasi-satellites due to the high orbital eccentricity . 2013 ND 15 will leave the 1: 1 resonance with Venus within about 500 years and become a recurring commuter (quasi-satellite). It appears that the asteroid was forced into its current orbit by Venus only about 7,000 years ago.

Potential danger

2013 ND 15 is not on the Minor Planet Center's List of Potentially Dangerous Asteroids (PHAs) because its absolute magnitude exceeds 22.0 mag; nevertheless it periodically comes close to the earth up to 0.05 AU (approx. 7.5 million km). On June 21, 2016, the asteroid approached Earth at a distance of 0.077 AU (approx. 11.5 million km).

Physical Properties

The 2013 ND 15 diameter is estimated to be 42 to 93 meters, based on an assumed albedo in the range 0.04 to 0.20.

exploration

After its discovery, ND 15 was observed from July 16 to August 8, 2013, a total of 22 times, which resulted in an observation sheet of 26 days (as of December 2019).

See also

Web links

Individual evidence

  1. ↑ List Of The Potentially Hazardous Asteroids (PHAs) ( accessed February 25, 2014 )
  2. ↑ NASA: Absolute-magnitude conversion table
  3. ↑ Asteroid 2013 ND15
  4. ↑ 2013 ND 15 at JPL