astro.wikisort.org - Asteroid

2006 HH₁₂₃, also written as 2006 HH123, was a misidentified nonexistent object that had a short 1 day observation arc. It was formerly thought to be a lost object with an assumed eccentricity of 0.46.[4] If it had been a scattered-disc object it would have had an absolute magnitude of 5.2,[4] and been a possible dwarf planet. The preliminary orbital elements (as displayed in the infobox to the right) were calculated using only three observations over a period of one day;[4] hence its orbit was very poorly known and it quickly became lost.

2006 HH₁₂₃

Discovery[1][2]
Discovered by	M. W. Buie R. L. Millis S. D. Kern
Discovery date	April 26, 2006
Designations
MPC designation	2006 HH123
Minor planet category	deleted[3] Lost TNO SDO
Orbital characteristics[4][5]
Epoch April 15, 2006 (JD 2453840.5)
Aphelion	82 AU (Q)
Perihelion	30 AU (q)
Semi-major axis	56 AU (a)
Eccentricity	0.46 (assumed)[4]
Orbital period (sidereal)	416 yr
Mean anomaly	360° (M)
Inclination	44°
Longitude of ascending node	240°
Argument of perihelion	0.4°
Physical characteristics
Absolute magnitude (H)	5.2[4]

Of the three discovery images, the first one is an unidentified object, the second one was identified as the main-belt asteroid (130902) 2000 VW₃₃, and the third image shows nothing at the measured position.[6] The three observations of 2006 HH₁₂₃ were deleted on 6 November 2014,[3] and the provisional designation 2006 HH₁₂₃ is no longer listed in the Minor Planet Center database.

See also

• (392741) 2012 SQ31 – misidentified as a large TNO on discovery, turned out to be a sub-kilometer main-belt asteroid
• 330 Adalberta – another misidentified nonexistent object (the name was later reused for an object that actually exists)

References

External links

• (Deleted) 2006 HH123 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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