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2010 AB78 is a dark asteroid on an eccentric orbit, classified as near-Earth object of the Amor group. It was first observed by the Wide-field Infrared Survey Explorer (WISE) on 12 January 2010.[1] The asteroid measures approximately 1.7 kilometers in diameter and has a low albedo of 0.03, which is rather typical for carbonaceous asteroids.[2]

2010 AB78
418872main wise20100122-full.jpg
Stellar field obtained by WISE. The red dot in the center is 2010 AB78.
Discovery [1]
Discovered byWISE
Discovery date12 January 2010
MPC designation2010 AB78
NEO · Amor[1][2]
Orbital characteristics[2]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc9.97 yr (3,641 days)
Aphelion3.4872 AU
Perihelion1.0216 AU
2.2544 AU
3.38 yr (1,236 days)
0° 17m 28.32s / day
Earth MOID0.2058 AU (80.2 LD)
Mars MOID0.1206 AU (18,000,000 km)[1]
Physical characteristics
Mean diameter
1.671±0.010 km[3]


First WISE discoveryEdit

2010 AB78 is expected to become the first of the many thousands of discoveries to be accredited to the WISE space telescope.[4][5] However, the official discoverer will only be defined upon the asteroid's numbering.[1]

The first observation of 2010 AB78 by WISE was on January 12, 2010, being observed again the next day. The Mauna Kea Observatory observed it the days 18 and 19 of January, allowing the Minor Planet Center to publish a circular on January 22 confirming the discovery.[4]


2010 AB78 orbits the Sun at a distance of 1.0–3.5 AU once every 3 years and 5 months (1,236 days). Its orbit has an eccentricity of 0.55 and an inclination of 33° with respect to the ecliptic.[2] Due to its eccentric orbit it is also a Mars-crosser. 2010 AB78 has the lowest possible orbital uncertainty, which suggests that it will be numbered in the near future.[2]

Close approachesEdit

This near-Earth asteroid has a minimum orbital intersection distance with Earth of 0.2058 AU (30,800,000 km), which corresponds to 80.2 lunar distances.[2] It does not make any notable close approaches to Earth within the next hundred years.[2]

Physical characteristicsEdit

According to the survey carried out by the NEOWISE mission of NASA's discovering WISE observatory, 2010 AB78 measures 1.671 kilometers in diameter and its surface has an albedo of 0.030.[3] Objects known for such low albedos are the carbonaceous C, D and P-type asteroids.

As of 2018, no lightcurve has been obtained. The body's rotation period, shape and pole remain unknown.[2][6]

Numbering and namingEdit

As of 2018, this minor planet has not been named or numbered.[1]


  1. ^ a b c d e f "2010 AB78". Minor Planet Center. Retrieved 17 August 2017.
  2. ^ a b c d e f g h i "JPL Small-Body Database Browser: (2010 AB78)" (2013-01-15 last obs.). Jet Propulsion Laboratory. Retrieved 17 August 2017.
  3. ^ a b c Mainzer, A.; Grav, T.; Bauer, J.; Masiero, J.; McMillan, R. S.; Cutri, R. M.; et al. (December 2011). "NEOWISE Observations of Near-Earth Objects: Preliminary Results" (PDF). The Astrophysical Journal. 743 (2): 17. arXiv:1109.6400. Bibcode:2011ApJ...743..156M. doi:10.1088/0004-637X/743/2/156. Retrieved 17 August 2017.
  4. ^ a b Lakdawalla, Emily (22 January 2010). "WISE bags its first near-Earth object, 2010 AB78". The Planetary Society. Retrieved 3 February 2018.
  5. ^ "The First Of Many Asteroid Finds For WISE". 25 January 2010. Retrieved 3 February 2018.
  6. ^ "LCDB Data for (2010)". Asteroid Lightcurve Database (LCDB). Retrieved 3 February 2018.

External linksEdit