astro.wikisort.org - Asteroid

(184212) 2004 PB₁₁₂, prov. designation: 2004 PB₁₁₂, is a trans-Neptunian object from the scattered disc, approximately 154 kilometers (96 miles) in diameter, and in a rare high-order orbital resonance ratio (4:27) with Neptune. It was discovered on 13 August 2004, by American astronomer Marc Buie at the Cerro Tololo Inter-American Observatory in Chile.[1]

(184212) 2004 PB₁₁₂

Discovery[1]
Discovered by	M. W. Buie
Discovery site	Cerro Tololo Obs.
Discovery date	13 August 2004
Designations
MPC designation	(184212) 2004 PB112
Alternative designations	2004 PB112
Minor planet category	TNO[2] · SDO[3][4] res 4:27[5]
Orbital characteristics[2]
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 3[2] · 0[1]
Observation arc	17.07 yr (6,236 d)
Aphelion	184.60 AU
Perihelion	35.333 AU
Semi-major axis	109.97 AU
Eccentricity	0.6787
Orbital period (sidereal)	1153.20 yrs
Mean anomaly	3.0647°
Mean motion	0° 0m 3.24s / day
Inclination	15.403°
Longitude of ascending node	356.73°
Argument of perihelion	3.6578°
Physical characteristics
Mean diameter	154 km (est. at 0.09)[3][6]
Absolute magnitude (H)	7.3[1][2]

Orbit and classification

2004 PB₁₁₂ orbits the Sun at a distance of 35.3–184.6 AU once every 1153 years and 2 months (421,205 days; semi-major axis of 109.97 AU). Its orbit has a high eccentricity of 0.68 and an inclination of 15° with respect to the ecliptic.[2] A first precovery was taken at Cerro Tololo in 2000, extending the body's observation arc by 4 years prior to its official discovery observation.[1]

2004 PB₁₁₂ reached perihelion on 5 October 2011 (JD 2455839.806).[2] It has been classified as a highly unusual 4:27 resonant trans-Neptunian object,[5]^: 49 but also simply as a scattered disc object,[3] or SCATNEAR, respectively, by the Deep Ecliptic Survey.[4]

Numbering and naming

This minor planet was numbered (184212) by the Minor Planet Center on 20 April 2008 (M.P.C. 62608).[7] As of 2021^[update], it has not been named.[1]

Physical characteristics

Based on a generic conversion from an absolute magnitude of 7.2, 2004 PB₁₁₂ measures between 100 and 220 kilometer in diameter.[6] Johnston's Archive estimates a mean-diameter of 154 kilometers (96 miles) assuming a typical albedo of 0.09.[3]

References

External links

• List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Discovery Circumstances: Numbered Minor Planets (180001)-(185000) – Minor Planet Center
• (184212) 2004 PB112 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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