Jump to content

(145451) 2005 RM43

From Wikipedia, the free encyclopedia
(145451) 2005 RM43
Hubble Space Telescope image of 2005 RM43 taken in 2008
Discovery[1]
Discovered byA. C. Becker
A. W. Puckett
J. M. Kubica
Discovery siteApache 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 arc14983 days (41.02 yr)
Earliest precovery date17 November 1976
Aphelion144.140 AU (21.5630 Tm)
Perihelion35.079 AU (5.2477 Tm)
89.610 AU (13.4055 Tm)
Eccentricity0.60854
848.28 yr (309834 d)
6.19°
0° 0m 4.183s / day
Inclination28.819°
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.

Description

[edit]
Precovery image of 2005 RM43 taken by the Siding Spring Observatory in 1976[8]

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]

See also

[edit]

References

[edit]
  1. ^ a b c d e "JPL Small-Body Database Browser: 145451 (2005 RM43)" (2017-11-25 last obs). Retrieved 2 February 2019.
  2. ^ a b c d 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. ^ a b "TNO Results". ERC Lucky Star Project. Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA). Retrieved 13 July 2020.
  4. ^ a b c d 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.
[edit]
Retrieved from "https://wiki.riteme.site/w/index.php?title=(145451)_2005_RM43&oldid=1281407889"