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|title=How many dwarf planets are there in the outer solar system? (updates daily)
|title=How many dwarf planets are there in the outer solar system? (updates daily)
|publisher=California Institute of Technology
|publisher=California Institute of Technology
|author=Michael E. Brown
|author=Michael E. Brown
|author-link=Michael E. Brown
|author-link=Michael E. Brown
|url=http://www.gps.caltech.edu/~mbrown/dps.html
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<ref name="h">{{cite web
<ref name="h">{{cite web

Revision as of 23:08, 3 September 2016

(145451) 2005 RM43
Discovery [1]
Discovered byA. C. Becker
A. W. Puckett
J. M. Kubica
Discovery siteAPO
Discovery date9 September 2005
Designations
(145451) 2005 RM43
SDO[2]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc14323 days (39.21 yr)
Aphelion145.68 AU (21.793 Tm)
Perihelion35.128 AU (5.2551 Tm)
90.405 AU (13.5244 Tm)
Eccentricity0.61143
859.60 yr (313968 d)
0.00113°/d
4.6425°
0° 0m 4.128s / day
Inclination28.759°
84.641°
318.55°
Earth MOID34.1897 AU (5.11471 Tm)
Jupiter MOID30.3841 AU (4.54540 Tm)
Physical characteristics
Dimensions580 km (assumed)[3]
6.71 h (0.280 d)
6.71 hours
0.09 (assumed)
B0−V0=0.590 (neutral)[4]
4.4[1]

(145451) 2005 RM43, also written as (145451) 2005 RM43, is a trans-Neptunian object that resides in the scattered disc region beyond the Kuiper belt. It was discovered on September 9, 2005 by Andrew Becker, Andrew Puckett and Jeremy Kubica at Apache Point Observatory in Sunspot, New Mexico.

(145451) 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, depending on its albedo, the surface reflectivity of the object.[7] One source gives an estimate of 580 km.[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. ^ a b c d e "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. ^ a b 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". arXiv:0804.2864.
  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. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  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.

External links


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