2010 KZ39

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2010 KZ39
2010KZ39-OCKS-KBO7.gif
Follow-up images of 2010 KZ39 taken at Las Campañas Obs.
Discovery [1] [2] [3]
Discovered by
Discovery site Las Campañas Obs.
(first observed)
Discovery date21 May 2010
(first observed)
Designations
2010 KZ39
Orbital characteristics [4] [5]
Epoch 2025 November 21 (JD  2461000.5)
Uncertainty parameter 4
Observation arc 11.94 yr (4,361 days)
Aphelion 47.46  AU
Perihelion 42.52 AU
44.99 AU
Eccentricity 0.0549
301.8  yr (110,200 days)
256.7°
0° 0m 11.772s / day
Inclination 26.138°
53.249°
≈ 6 May 2110 [6]
±5 months
323.6°
Known satellites 0
Physical characteristics
743 km? [7] 660 km (estimated albedo) [8]
0.10(assumed) [9]
20.7 [10]

    2010 KZ39 is a trans-Neptunian object orbiting the Sun as a detached object in the outer reaches of the Solar System, estimated to be somewhere around 700 kilometres (400 miles) in diameter. The object was first observed on 21 May 2010 by astronomers Andrzej Udalski, Scott Sheppard, M. Szymanski and Chad Trujillo at the Las Campañas Observatory in Chile. [1] [3]

    Contents

    Description

    2010 KZ39 orbits the Sun at a distance of 42.5–47.5  AU once every 302 years, similar to Makemake, 19521 Chaos and other bodies that circle the Sun in 6:11 resonance to Neptune. Its orbit has an eccentricity of 0.055 and an inclination of 26° with respect to the ecliptic.

    Using the best-fit values for its orbit, it is expected to come to perihelion in 2109. [4] It has been observed 50 times over 12 years and has an uncertainty parameter of 4. [1] As of 2025, it is 45.677 AU from the Sun. [10] The body's spectral type as well as its rotation period remain unknown.

    References

    1. 1 2 3 "(2010 KZ39)". Minor Planet Center. Retrieved 21 September 2016.
    2. ↑ "MPEC 2010-L38 : 2010 KZ39". IAU Minor Planet Center. 8 June 2010. Retrieved 3 December 2010.
    3. 1 2 All four named discoverers are uncredited in sources.
    4. 1 2 3 4 "JPL Small-Body Database Browser: (2010 KZ39)" (2022-04-29 last obs.). Jet Propulsion Laboratory . Retrieved 3 April 2017.
    5. 1 2 Marc W. Buie. "Orbit Fit and Astrometric record for 10KZ39" (last observation: 2012-03-20 using 28 of 28 observations over 1.83 years). SwRI (Space Science Department). Retrieved 18 August 2011.
    6. ↑ JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
    7. ↑ "List of known trans-Neptunian objects". www.johnstonsarchive.net. Archived from the original on 14 August 2025. Retrieved 24 November 2025.
    8. ↑ "Asteroid Size Estimator". cneos.jpl.nasa.gov. Archived from the original on 30 August 2025. Retrieved 24 November 2025.
    9. ↑ "LCDB Data for 2010 KZ39". Asteroid Lightcurve Database (LCDB). Retrieved 3 April 2017.
    10. 1 2 "AstDyS: 2010 KZ39 Ephemerides". AstDyS. Retrieved 7 April 2014.
    11. Benecchi, Susan D.; Sheppard, Scott S. (May 2013). "Light Curves of 32 Large Transneptunian Objects". The Astronomical Journal. 145 (5): 19. arXiv: 1301.5791 . Bibcode:2013AJ....145..124B. doi:10.1088/0004-6256/145/5/124. S2CID   54183985 . Retrieved 3 April 2017.
    12. Michael E. Brown (2013). "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology . Retrieved 14 August 2019.
    13. Dan Bruton. "Conversion of Absolute Magnitude to Diameter for Minor Planets". Department of Physics & Astronomy (Stephen F. Austin State University). Archived from the original on 23 July 2011. Retrieved 18 August 2011.
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