(145451) 2005 RM43

Last updated
(145451) 2005 RM43
145451-2005rm43.jpg
Hubble Space Telescope image of 2005 RM43 taken in 2008
Discovery [1]
Discovered by A. C. Becker
A. W. Puckett
J. M. Kubica
Discovery site Apache Point Obs.
Discovery date9 September 2005
Designations
(145451) 2005 RM43
SDO [2]
Orbital characteristics [1]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2
Observation arc 14983 days (41.02 yr)
Earliest precovery date17 November 1976
Aphelion 144.140  AU (21.5630  Tm)
Perihelion 35.079 AU (5.2477 Tm)
89.610 AU (13.4055 Tm)
Eccentricity 0.60854
848.28 yr (309834 d)
6.19°
0° 0m 4.183s / day
Inclination 28.819°
84.61°
318.10°
Physical characteristics
≈644 km(derived from occultation; 455 and 460 km measured) [3]
524+96
−103 km [4]
Mean density
>0.56 g/cm3 [2]
6.71  h (0.280  d)
0.102 [4]
V–R=0.33±0.02 (neutral) [4]
B0−V0=0.590 [5]
B-R=0.99 [2]
20.4 [6]
4.52±0.01 [4]
4.4 [1]  ·4.8 [7]

    (145451) 2005 RM43 (provisional designation 2005 RM43) is a large 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 600 kilometers in diameter.

    Contents

    Description

    Precovery image of 2005 RM43 taken by the Siding Spring Observatory in 1976 2005rm43-19761117.gif
    Precovery image of 2005 RM43 taken by the Siding Spring Observatory in 1976

    2005 RM43 has been observed 303 times over 17 oppositions, with precovery images dating back to 1976. [1] [9] The orbit is well determined with an uncertainty parameter of 2. [1]

    In 2018, two stellar occultations by 2005 RM43 were observed on 3 February and 24 December. [3] The February occultation yielded a single chord length of 456 km (283 mi). [10] Observations of the December occultation yielded two positive chords, which together suggest an approximate diameter of 644 km (400 mi). [11] Johnston's Archive estimates 2005 RM43 to be 584 km in diameter, based on an absolute magnitude of 4.4 and an assumed albedo of 0.09. [2]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 145451 (2005 RM43)" (2017-11-25 last obs). Retrieved 2 February 2019.
    2. 1 2 3 4 Wm. Robert Johnston. "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 2 February 2019. Retrieved 2 February 2019.
    3. 1 2 "TNO Results". ERC Lucky Star Project. Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA). Retrieved 13 July 2020.
    4. 1 2 3 4 Farkas-Takács, A.; Kiss, Cs.; Vilenius, E.; Marton, G.; Müller, T. G.; Mommert, M.; et al. (28 February 2020). "TNOs are Cool! A Survey of the transneptunian Region XV. Physical characteristics of 23 resonant transneptunian and scattered disk objects". Astronomy & Astrophysics. A23: 638. arXiv: 2002.12712 . Bibcode:2020A&A...638A..23F. doi:10.1051/0004-6361/201936183. S2CID   216193564.
    5. ↑ 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 (4): 1502–1509. arXiv: 0804.2864 . Bibcode:2008AJ....136.1502R. doi:10.1088/0004-6256/136/4/1502. S2CID   117167835.
    6. ↑ AstDyS. "(145451) 2005RM43 – Observation prediction". Department of Mathematics, University of Pisa. Retrieved 2 February 2019.
    7. ↑ 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 2 February 2019. Retrieved 2 February 2019.
    8. ↑ Lowe, Andrew. "(145451) 2005 RM43 Precovery Images". andrew-lowe.ca.
    9. ↑ "(145451) = 2005 RM43". Minor Planet Center. Retrieved 2 February 2019.
    10. ↑ "Occultation by 2005 RM43 in 03 02 2018" (PDF). ERC Lucky Star Project. Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA). 3 February 2018. Retrieved 13 July 2020.
    11. ↑ "Occultation by 2005 RM43 in 23 DEC 2018" (PDF). ERC Lucky Star Project. Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA). 24 December 2018. Retrieved 13 July 2020.


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