(145451) 2005 RM43

(145451) 2005 RM43
Discovery [1]
Discovered by A. C. Becker
A. W. Puckett
J. M. Kubica
Discovery site Apache Point Obs.
Discovery date 9 September 2005
Designations
MPC designation (145451) 2005 RM43
SDO [2]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc 14323 days (39.21 yr)
Earliest precovery date 17 November 1976
Aphelion 145.68 AU (21.793 Tm)
Perihelion 35.128 AU (5.2551 Tm)
90.405 AU (13.5244 Tm)
Eccentricity 0.61143
859.60 yr (313968 d)
0.00113°/d
4.6425°
0° 0m 4.128s / day
Inclination 28.759°
84.641°
318.55°
Physical characteristics
Dimensions 558 km (calculated)[3]
6.71 h (0.280 d)
6.71 hours
0.09 (assumed)[3]
B0−V0=0.590 (neutral)[4]
4.4[1]

    (145451) 2005 RM43, provisionally known as 2005 RM43, is a trans-Neptunian object that resides in the scattered disc region beyond the Kuiper belt. It was discovered on 9 September 2005, by American astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica at Apache Point Observatory in Sunspot, New Mexico. It measures approximately 558 kilometers in diameter.[3]

    Description

    2005 RM43 is considered likely to be a dwarf planet by both Brown and Tancredi.[5][6] Based on an absolute magnitude of 4.4, the body's diameter could be anywhere in the range of 350 to 800 kilometres (km), depending on its albedo, the surface reflectivity of the object.[7] One source gives an estimate of 558 km, based on an assumed albedo of 0.09.[3]

    It has been observed 219 times over eleven oppositions, with precovery images back to 1976.[1] The orbit is well determined with an uncertainty parameter of 2.[1]

    See also

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 145451 (2005 RM43)" (2015-02-18 last obs). Retrieved 7 April 2016.
    2. ↑ "MPEC 2009-P26 :Distant Minor Planets (2009 AUG. 17.0 TT)". IAU Minor Planet Center. 2009-08-07. Retrieved 2009-08-28.
    3. 1 2 3 4 Wm. Robert Johnston. "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 24 June 2009. Retrieved 24 March 2015.
    4. ↑ David L. Rabinowitz; Bradley E. Schaefer; Martha W. Schaefer; Suzanne W. Tourtellotte (2008). "The Youthful Appearance of the 2003 EL61 Collisional Family". The Astronomical Journal. 136: 1502–1509. arXiv:0804.2864. Bibcode:2008AJ....136.1502R. doi:10.1088/0004-6256/136/4/1502.
    5. ↑ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 2011-10-18. Retrieved 2012-01-19.
    6. ↑ Tancredi, G. (2010). "Physical and dynamical characteristics of icy "dwarf planets" (plutoids)". Icy Bodies of the Solar System: Proceedings IAU Symposium No. 263, 2009.
    7. ↑ "Absolute Magnitude (H)". NASA / JPL. Retrieved 2010-02-13.
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