(145453) 2005 RR43

(145453) 2005 RR43
Precovery image of 2005 RR43 taken by the Siding Spring Observatory in 1983
Discovery[1]
Discovered byAndrew C. Becker
Andrew W. Puckett
Jeremy M. Kubica
Discovery siteApache Point Obs.
Discovery date9 September 2005
Designations
(145453) 2005 RR43
cubewano[2]
extended (DES)[3]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc14301 days (39.15 yr)
Aphelion49.050 AU (7.3378 Tm)
Perihelion37.276 AU (5.5764 Tm)
43.163 AU (6.4571 Tm)
Eccentricity0.13639
283.58 yr (103578 d)
0.00346°/d
43.576°
0° 0m 12.513s / day
Inclination28.506°
85.852°
279.66°
Earth MOID36.394 AU (5.4445 Tm)
Jupiter MOID32.9176 AU (4.92440 Tm)
Physical characteristics
300+43
−34 km[4]
7.87 h (0.328 d)
7.87 h[5]
0.44+0.12
−0.10[4]
B−V=0.77,
V−R=0.41[6]
B0−V0=0.790[7]
4.1[1][8]
4.0[5][9]
4.4 (per Brown)[10]

(145453) 2005 RR43 (provisional designation 2005 RR43) is a trans-Neptunian object about 300 km (190 mi) in diameter.[4] It belongs to the Haumea family, a group of bright, water ice-rich objects in the Kuiper belt that are believed to have fragmented off the dwarf planet Haumea. 2005 RR43 was discovered on 9 September 2005 by Andrew Becker, Andrew Puckett and Jeremy Kubica at Apache Point Observatory in Sunspot, New Mexico.

History

Discovery

2005 RR43 was discovered by astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica on 9 September 2005, during observations for the Sloan Digital Sky Survey.[11][12] The discovery observations were made using the 2.5-meter telescope at Apache Point Observatory in Sunspot, New Mexico.[12] The discoverers further observed 2005 RR43 until December 2005.[12] The team's discovery of 2005 RR43 alongside several other trans-Neptunian objects was announced by the Minor Planet Center (MPC) on 31 August 2006.[12] On the following day, the MPC reported pre-discovery detections of 2005 RR43 in 2001–2002 observations by Palomar Observatory's Near-Earth Asteroid Tracking program.[13] Since then, 2005 RR43 has been found in even earlier observations by the Siding Spring Observatory; these include Digitized Sky Survey images from November 1976, August 1982, and October 1983.[11][14]

Number and name

This object has the minor planet provisional designation 2005 RR43, which was given by the MPC in the discovery announcement.[12] The provisional designation indicates the year and half-month of the object's discovery date.[15] 2005 RR43 received its permanent minor planet catalog number of 145453 from the MPC on 5 December 2006.[16] The Kuiper belt objects 145451 Rumina and 145452 Ritona directly come before 2005 RR43's number in the minor planet catalog.[16]

2005 RR43 does not have a proper name and the discoverers' privilege for naming this object expired ten years after it was numbered.[11][17]: 6  According to naming guidelines by the International Astronomical Union's Working Group for Small Bodies Nomenclature, 2005 RR43 is open for name suggestions that relate to creation myths, as recommended for Kuiper belt objects in general.[17]: 8 

Origin

Main article: Haumea family

Based on their common pattern of IR water-ice absorptions, neutral visible spectrum,[9] and the clustering of their orbital elements, the other KBOs (24835) 1995 SM55, (19308) 1996 TO66, (55636) 2002 TX300 and (120178) 2003 OP32 appear to be collisional fragments broken off the dwarf planet Haumea.

Surface

The surface is covered by water ice as attested by deep absorption at 1.5 and 2 μm in the infrared spectrum and neutral (i.e. non-red) colour. Scattering models reveal that the observed water ice is, at least in a significant fraction, crystalline and organics, detected on the surface of many trans-Neptunian objects (TNOs), are completely absent.[9] These physical and orbital characteristics common with Haumea led to suggestion that 2005 RR43 is a member of the Haumea collisional family. The object, together with other members of the family ((19308) 1996 TO66, (24835) 1995 SM55, (55636) 2002 TX300 and (120178) 2003 OP32), would be created from ice mantle ejected from the proto-Haumea as result of a collision with another large (around 1,660 kilometres (1,030 mi)) body.[18]

Neutral (non-red) color index

The + marks 2005 RR43 (B−V=0.77, V−R=0.41) on this color plot of TNOs. All the other Haumea-family members are located to the lower left of this point.

References

  1. ^ a b c "JPL Small-Body Database Browser: 145453 (2005 RR43)" (2014-01-02 last obs). Retrieved 7 April 2016.
  2. ^ "MPEC 2009-R09 :Distant Minor Planets (2009 SEPT. 16.0 TT)". IAU Minor Planet Center. 2009-09-04. Retrieved 2011-01-08.
  3. ^ Marc W. Buie. "Orbit Fit and Astrometric record for 145453" (2008-12-06 using 140 observations). SwRI (Space Science Department). Retrieved 2009-10-04.
  4. ^ a b c Vilenius, E.; Stansberry, D.; Müller, T., T.; Mueller, M.; Kiss, C.; Santos-Sanz, P.; et al. (October 2018). ""TNOs are Cool": A survey of the trans-Neptunian region. XIV. Size/albedo characterization of the Haumea family observed with Herschel and Spitzer". Astronomy & Astrophysics. 618: A136. arXiv:1904.06333. Bibcode:2018A&A...618A.136V. doi:10.1051/0004-6361/201732564. A136.
  5. ^ a b Carry, Benoit; Snodgrass, Colin; Lacerda, Pedro; Hainaut, Olivier; Dumas, Christophe (16 July 2012). "Characterisation of candidate members of (136108) Haumea's family: II. Follow-up observations" (PDF). Astronomy & Astrophysics. 544. EDP Sciences: A137. arXiv:1207.6491. Bibcode:2012A&A...544A.137C. doi:10.1051/0004-6361/201219044. S2CID 119256112. Archived from the original (PDF) on 7 November 2014. Retrieved 8 June 2014.
  6. ^ Snodgrass, Carry; Dumas, Hainaut (16 December 2009). "Characterisation of candidate members of (136108) Haumea's family". Astronomy and Astrophysics. 511: A72. arXiv:0912.3171. Bibcode:2010A&A...511A..72S. doi:10.1051/0004-6361/200913031. S2CID 62880843.
  7. ^ 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.
  8. ^ (145453) = 2005 RR43 Orbit
  9. ^ a b c Pinilla-Alonso, N.; Licandro, J.; Gil-Hutton, R.; Brunetto, R. (June 2007). "The water ice rich surface of (145453) 2005 RR43: a case for a carbon-depleted population of TNOs?" (PDF). Astronomy and Astrophysics. 468 (1): L25. arXiv:astro-ph/0703098. Bibcode:2007A&A...468L..25P. doi:10.1051/0004-6361:20077294. S2CID 18546361.
  10. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system?". Archived from the original on 2011-10-18. Retrieved 2014-11-07.
  11. ^ a b c "(145453) = 2005 RR43". Minor Planet Center. Retrieved 2025-09-08.
  12. ^ a b c d e Becker, A. C.; Puckett, A. W.; Kubika, J.; Marsden, B. G. (2006-08-31). "MPEC 2006-Q70 : 2005 RP43, 2005 RQ43, 2005 RR43, 2005 RS43, 2005 SC278, 2005 SD278, 2005 SE278". Minor Planet Electronic Circular. 2006-Q70. Minor Planet Center. Bibcode:2006MPEC....Q...70B. Retrieved 2025-09-08.
  13. ^ Bambery, R.; Helin, E.; Pravdo, S.; Hicks, M.; Lawrence, K.; Thicksten, R.; et al. (2006-09-01). "MPEC 2006-R01 : 2005 RR43". Minor Planet Electronic Circular. 2006-R01. Minor Planet Center. Bibcode:2006MPEC....R...01B. Retrieved 2025-09-08.
  14. ^ Lowe, Andrew. "(145453) 2005 RR43 Precovery Images". andrew-lowe.ca. Archived from the original on 2017-04-27. Retrieved 2025-09-08.
  15. ^ "New- And Old-Style Minor Planet Designations". Minor Planet Center. Retrieved 2025-09-08.
  16. ^ a b "M.P.C. 58206" (PDF). Minor Planet Circulars (58206). Minor Planet Center: 160. 2006-12-05. Retrieved 2025-07-21.
  17. ^ a b "Rules and Guidelines for Naming Non-Cometary Small Solar-System Bodies" (PDF). IAU Working Group for Small Bodies Nomenclature. 22 February 2025. Retrieved 2025-09-08.
  18. ^ Michael E. Brown; Kristina M. Barkume; Darin Ragozzine; Emily L. Schaller (2007). "A collisional family of icy objects in the Kuiper belt" (PDF). Nature. 446 (7133): 294–296. Bibcode:2007Natur.446..294B. doi:10.1038/nature05619. PMID 17361177. S2CID 4430027.
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