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(24835) 1995 SM55, provisional designation 1995 SM55, is a trans-Neptunian object and member of the Haumea family that resides in the Kuiper belt, located in the outermost region of the Solar System. It was discovered on 19 September 1995, by American astronomer Nichole Danzl of the Spacewatch program at Kitt Peak National Observatory near Tucson, Arizona, in the United States.[2] It measures approximately 200 kilometers in diameter and was the second-brightest known object in the Kuiper belt, after Pluto, until 1996 TO66 was discovered.

(24835) 1995 SM55
Discovery[1][2]
Discovered byN. Danzl
Discovery siteSpacewatch
Kitt Peak National Obs.
Discovery date19 September 1995
Designations
MPC designation
(24835) 1995 SM55
Alternative designations
1995 SM55
Minor planet category
TNO[1] · Haumea[3] · cubewano[4][5]
Scat-Ext[6] · distant[2]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3
Observation arc34.29 yr (12,523 days)
Aphelion45.870 AU
Perihelion37.386 AU
Semi-major axis
41.628 AU
Eccentricity0.1019
Orbital period (sidereal)
268.59 yr (98,101 days)
Mean anomaly
329.45°
Mean motion
0° 0m 13.32s / day
Inclination27.096°
Longitude of ascending node
21.109°
Time of perihelion
≈ 7 June 2040[7]
±5 days
Argument of perihelion
72.600°
Physical characteristics
Mean diameter
173 km (estimate)[3]
519.43 km (derived)[8]
610 km (Haumea-derived)[9]
701 km[4]
704 km (upper limit)[10][11]
Synodic rotation period
8.08±0.02 h[12]
8.08±0.03 h[13]
Geometric albedo
0.7 (Haumea-derived)[3]
0.040[4]
0.067 (at least)[10]
0.10 (assumed)[8]
Spectral type
BBb (suspected)[14] · C[8]
(Neutral)
B–V = 0.65[8]
V−R = 0.37[8]
V−I = 0.710[8]
Absolute magnitude (H)
4.30±0.02 (R)[15]
4.352±0.040 (R)[16]
4.490±0.030[17]
4.54[8][18] · 4.6[1] · 4.9[3]

    Origin


    Main article: Haumea family

    1995 SM55 is a member of the Haumea family.[3] It has the highest collisional velocity, a δv of 123.3 m/s, of all confirmed members.[19] Based on their common pattern of IR water-ice absorptions, neutral visible spectrum[20] and the clustering of their orbital elements, the other KBOs 1996 TO66, 2002 TX300, 2003 OP32 and 2005 RR43 all appear to be collisional fragments broken off of the dwarf planet Haumea.


    Naming


    As of 2018, this minor planet has not been named by the Minor Planet Center.[2]


    Orbital diagram


    1995 SM55 among other members of the Haumea family
    1995 SM55 among other members of the Haumea family

    References


    1. "JPL Small-Body Database Browser: 24835 (1995 SM55)" (2016-12-29 last obs.). Jet Propulsion Laboratory. Retrieved 8 February 2018.
    2. "24835 (1995 SM55)". Minor Planet Center. Retrieved 8 February 2018.
    3. Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 8 February 2018.
    4. Johnston, Wm. Robert (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 8 February 2018.
    5. "MPEC 2009-R09 :Distant Minor Planets (2009 SEPT. 16.0 TT)". IAU Minor Planet Center. 4 September 2009. Retrieved 4 October 2009.
    6. Marc W. Buie. "Orbit Fit and Astrometric record for 24835" (2004-11-02 using 119 of 123 observations). SwRI (Space Science Department). Retrieved 4 October 2009.
    7. JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
    8. "LCDB Data for (24835)". Asteroid Lightcurve Database (LCDB). Retrieved 8 February 2018.
    9. "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 8 February 2018.
    10. Grundy, W. M.; Noll, K. S.; Stephens, D. C. (July 2005). "Diverse albedos of small trans-neptunian objects". Icarus. 176 (1): 184–191. arXiv:astro-ph/0502229. Bibcode:2005Icar..176..184G. doi:10.1016/j.icarus.2005.01.007. S2CID 118866288.
    11. John Stansberry; Will Grundy; Mike Brown; Dale Cruikshank; John Spencer; David Trilling; et al. (2007). Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope. arXiv:astro-ph/0702538. Bibcode:2008ssbn.book..161S.
    12. Thirouin, Audrey; Sheppard, Scott S.; Noll, Keith S.; Moskovitz, Nicholas A.; Ortiz, Jose Luis; Doressoundiram, Alain (June 2016). "Rotational Properties of the Haumea Family Members and Candidates: Short-term Variability". The Astronomical Journal. 151 (6): 20. arXiv:1603.04406. Bibcode:2016AJ....151..148T. doi:10.3847/0004-6256/151/6/148. S2CID 118510175.
    13. Sheppard, Scott S.; Jewitt, David C. (June 2003). "Hawaii Kuiper Belt Variability Project: An Update". Earth. 92 (1): 207–219. Bibcode:2003EM&P...92..207S. doi:10.1023/B:MOON.0000031943.12968.46. S2CID 189905992.
    14. Belskaya, Irina N.; Barucci, Maria A.; Fulchignoni, Marcello; Dovgopol, Anatolij N. (April 2015). "Updated taxonomy of trans-neptunian objects and centaurs: Influence of albedo". Icarus. 250: 482–491. Bibcode:2015Icar..250..482B. doi:10.1016/j.icarus.2014.12.004.
    15. Jewitt, David; Peixinho, Nuno; Hsieh, Henry H. (November 2007). "U-Band Photometry of Kuiper Belt Objects". The Astronomical Journal. 134 (5): 2046–2053. Bibcode:2007AJ....134.2046J. doi:10.1086/522787.
    16. Peixinho, N.; Delsanti, A.; Guilbert-Lepoutre, A.; Gafeira, R.; Lacerda, P. (October 2012). "The bimodal colors of Centaurs and small Kuiper belt objects". Astronomy and Astrophysics. 546: 12. arXiv:1206.3153. Bibcode:2012A&A...546A..86P. doi:10.1051/0004-6361/201219057. S2CID 55876118.
    17. Rabinowitz, David L.; Schaefer, Bradley E.; Schaefer, Martha; Tourtellotte, Suzanne W. (October 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.
    18. Romanishin, W.; Tegler, S. C. (December 2005). "Accurate absolute magnitudes for Kuiper belt objects and Centaurs". Icarus. 179 (2): 523–526. Bibcode:2005Icar..179..523R. doi:10.1016/j.icarus.2005.06.016.
    19. Snodgrass, C.; Carry, B.; Dumas, C.; Hainaut, O. (February 2010). "Characterisation of candidate members of (136108) Haumea's family". Astronomy and Astrophysics. 511: 9. arXiv:0912.3171. Bibcode:2010A&A...511A..72S. doi:10.1051/0004-6361/200913031. S2CID 62880843.
    20. 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?". Astronomy and Astrophysics. 468 (1): L25. arXiv:astro-ph/0703098. Bibcode:2007A&A...468L..25P. doi:10.1051/0004-6361:20077294. S2CID 18546361.



    На других языках

    [de] (24835) 1995 SM55

    (24835) 1995 SM55 ist ein transneptunisches Objekt, das als Cubewano oder SDO eingestuft wird. Es ist ein Mitglied der Haumea-Familie.
    - [en] (24835) 1995 SM55

    [ru] (24835) 1995 SM55

    (24835) 1995 SM55 является транснептуновым объектом расположенным в поясе Койпера[7][8].


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