2006 QH181

2006 QH₁₈₁ (provisional designation 2006 QH₁₈₁) is a trans-Neptunian object (TNO) in the scattered disc.^[3][4]

2006 QH₁₈₁

2006 QH181 imaged by the Hubble Space Telescope in 2010
Discovery[1]
Discovery site	Cerro Tololo Obs.
Discovery date	21 August 2006
Designations
MPC designation	2006 QH181
Minor planet category	TNO[2] · SDO[3][4] · distant[1]
Orbital characteristics[1]
Epoch 13 September 2023 (JD 2460200.5)
Uncertainty parameter 5
Observation arc	14.18 yr (5,178 days)
Aphelion	93.977 AU
Perihelion	38.774 AU
Semi-major axis	66.375 AU
Eccentricity	0.4158
Orbital period (sidereal)	541 yr
Mean anomaly	113.85°
Mean motion	0° 0m 6.561s / day
Inclination	19.063
Longitude of ascending node	73.85
Argument of perihelion	208.75
Physical characteristics
Mean diameter	350–560 km (est. 0.08–0.20)[5]
Absolute magnitude (H)	4.62[2][1]

Orbit

Diagram of 2006 QH₁₈₁'s orbit

2006 QH₁₈₁ orbits the Sun beyond Neptune with an orbital period of 541 years. It has a highly elliptical orbit with a semi-major axis of 66.4 astronomical units (AU) and an orbital eccentricity of 0.42. In its eccentric orbit, 2006 QH₁₈₁ comes within 38.8 AU from the Sun at perihelion and 94.0 AU at aphelion. It has an orbital inclination of about 19° with respect to the ecliptic.^[2]

Distance

See also: List of Solar System objects most distant from the Sun

It came to perihelion around 1858.^[2] It is currently 83.8 AU from the Sun^[6] and moving away from the Sun at 1.04 kilometers per second (2,300 miles per hour).^[7] The only large objects currently farther from the Sun are Eris (96.1 AU),^[8] 2014 UZ224 (90.9 AU), 2015 TH367 (~89 AU), Gonggong (88.0 AU),^[9] Sedna (85.1 AU),^[10] 2013 FS28 (84.8 AU), and 2014 FC69 (84.7 AU). Because it is so far from the Sun, it only has an apparent magnitude of 23.6.^[6]

See also

• List of Solar System objects most distant from the Sun