(55636) 2002 TX 300

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Asteroid
(55636) 2002 TX 300
2002 TX300
Properties of the orbit ( animation )
Epoch:  4th September 2017 ( JD 2,458,000.5)
Orbit type Cubewano
family Haumea family
Major semi-axis 43,065  AU
eccentricity 0.123
Perihelion - aphelion 37.749 AU - 48.38 AU
Inclination of the orbit plane 25.9 °
Length of the ascending node 324.6 °
Argument of the periapsis 338.3 °
Time of passage of the perihelion September 10, 1957
Sidereal period 282 a 7½ M
Mean orbital velocity 4.521 km / s
Physical Properties
Medium diameter 286 ± 10 km
Albedo 0.88 +0.015−0.008
Rotation period 8 h 7 min 12 s
Absolute brightness 3.4 likes
history
Explorer Spacewatch
Date of discovery October 15, 2002
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(55636) 2002 TX 300 is a Trans-Neptunian object that was discovered in October 2002. The Kuiper belt object is classified as a Cubewano and has a diameter of 286 ± 10 kilometers.

discovery

2002 TX 300 was discovered on October 15, 2002 by the NEAT program .

After its discovery, the TX 300 could be identified in photos from August 27, 1954 in 2002 and its orbit calculated relatively precisely. Since then, the planetoid has been observed through various telescopes. In January 2018, there were 374 observations over a period of 63 years from 20 oppositions.

properties

Orbit

The orbit of 2002 TX 300 (blue) compared to those of Haumea (green) and Neptune (gray)

2002 TX 300 orbits the sun on an elliptical orbit ( eccentricity = 0.123) between 37.75 and 48.38  AU distance. The orbit is inclined 25.86 ° to the ecliptic . The orbital period is 282.62 years. It will reach perihelion in mid-2059. It is currently about 42.5 AU from the Sun.

It is a member of the Haumea family and a piece of Haumea's original ice mantle. All known members of the Haumea family - incl. 2002 TX 300 and the Haumea moon Hiʻiaka - together have only about 2% of Haumea's mass.

size

On the occasion of a star occultation on October 9, 2009, the diameter of 2002 TX 300 was determined to be 286 ± 10 km. Previously, it was still considered a dwarf planet candidate with estimates up to 640 km in diameter .

rotation

2002 TX 300 rotates once around its axis in 8 hours and 7 minutes. However, if the asteroid is irregularly shaped, a period of rotation that is twice as long cannot be completely ruled out.

surface

The object has a very high albedo of 0.88, which is why its size was initially several times overestimated. The light surface consists mainly of water ice, which is indicated by strong corresponding absorption bands in its spectrum. The mineralogical analysis suggests a significant proportion of larger (H 2 O) ice particles. In contrast, the occurrence of tholines is extremely low, which is attributed to another recent collision.

See also

Web links

Individual evidence

  1. ↑ a b Colin Snodgrass, Benoit Carry, Christophe Dumas, Olivier Hainaut: Characterization of candidate members of (136108) Haumea's family . In: EDP Sciences (Ed.): Astronomy and Astrophysics . 511, March 12, 2010, p. A72. arxiv : 0912.3171 . bibcode : 2010A & A ... 511A..72S . doi : 10.1051 / 0004-6361 / 200913031 .
  2. ↑ Benoit Carry, Colin Snodgrass, Pedro Lacerda, Olivier Hainaut, Christophe Dumas: Characterization of candidate members of (136108) Haumea's family: II. Follow-up observations . In: EDP Sciences (Ed.): Astronomy & Astrophysics . 544, August 14, 2012, p. A137. arxiv : 1207.6491 . bibcode : 2012A & A ... 544A.137C . doi : 10.1051 / 0004-6361 / 201219044 .
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ↑ a b c J. L. Elliot, MJ Person, CA Zuluaga, AS Bosh, ER Adams, TC Brothers, AAS Gulbis, SE Levine, M. Lockhart: Size and albedo of Kuiper belt object 55636 from a stellar occultation . In: Nature . 465, No. 7300, June 17, 2010, pp. 897-900. bibcode : 2010Natur.465..897E . doi : 10.1038 / nature09109 . PMID 20559381 .
  5. ↑ a b A .. Thirouin, JL Ortiz, A. Campo Bagatin, P. Pravec, N. Morales, O. Hainaut, R. Duffard: Short-term variability of 10 trans-Neptunian objects . In: Monthly Notices of the Royal Astronomical Society . 424, No. 4, August 21, 2012, pp. 3156-3177. arxiv : 1207.2044 . bibcode : 2012MNRAS.424.3156T . doi : 10.1111 / j.1365-2966.2012.21477.x .
  6. ↑ (55636) 2002 TX300 in the Small-Body Database of the Jet Propulsion Laboratory (English). Template: JPL Small-Body Database Browser / Maintenance / AltRetrieved January 23, 2018.
  7. ↑ (55636) 2002 TX300 at the IAU Minor Planet Center (English)
  8. ↑ AstDyS-2. Universita di Pisa, accessed January 23, 2018 .
  9. ↑ Michael E. Brown, Kristina M. Barkume, Darin Ragozzine, Emily L. Schaller: A collisional family of icy objects in the Kuiper belt . In: Nature . 446, No. 7133, 2007, pp. 294-296. bibcode : 2007Natur.446..294B . doi : 10.1038 / nature05619 . PMID 17361177 .
  10. ↑ Robert Tindol: Kuiper-belt object was broken up by massive impact 4.5 trillion years ago, study shows. California Institute of Technology, March 14, 2007, accessed January 23, 2018 .
  11. ↑ Audrey Thirouin, Scott S. Sheppard, Keith S. Noll, Nicholas A. Moskovitz, Jose Luis Ortiz, Alain Doressoundiram: Rotational Properties of the Haumea Family Members and Candidates: Short-term Variability . In: The Astronomical Journal . 151, No. 6, May 25, 2016, p. 148. arxiv : 1603.04406 . bibcode : 2016AJ .... 151..148T . doi : 10.3847 / 0004-6256 / 151/6/148 . Retrieved January 23, 2018.
  12. ^ John Stansberry, Will Grundy, Mike Brown, Dale Cruikshank, John Spencer, David Trilling, Jean-Luc Margot: Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope. (PDF) Retrieved January 23, 2018 . arxiv : astro-ph / 0702538
  13. ↑ J. Licandro, L. di Fabrizio, N. Pinilla-Alonso, J. de León, E. Oliva: Trans-neptunian object (55636) 2002 TX 300 , a fresh icy surface in the outer solar system . In: EDP Sciences (Ed.): Astronomy & Astrophysics . 457, No. 1, September 12, 2006, pp. 329-333. bibcode : 2006A & A ... 457..329L . doi : 10.1051 / 0004-6361: 20064906 .
  14. ↑ N. Pinilla-Alonso, J. Licandro, H. Campins: Mineralogical analysis of two different kind of icy surfaces in the trans-neptunian belt, TNOs (50000) Quaoar and 2002 TX 300 . In: Bulletin of the American Astronomical Society . 36, No. DPS meeting # 36, id. 11.07, November 2004, p. 1088. bibcode : 2004DPS .... 36.1107P .