Movatterモバイル変換

[0]ホーム
URL:

Jump to content
WikipediaThe Free Encyclopedia
Search

148780 Altjira

From Wikipedia, the free encyclopedia
Binary KBO (Kuiper Belt Object)
(148780) Altjira
Altjira and its companion imaged by theHubble Space Telescope in 2006
Discovery
Discovery siteDeep Ecliptic Survey atKitt Peak[1]
Discovery date20 October 2001
Designations
(148780) Altjira
Pronunciation/ælˈtʃɪərə/
Named after
Altjira
2001 UQ18
Classical KBO (DES)[2]
Orbital characteristics[1]
Epoch 2025 May 05 (JD 2460800.5)
Uncertainty parameter 4
Observation arc7,709 days (21.11 yr)
Aphelion47.11 AU (7.048 Tm)
Perihelion42.00 AU (6.283 Tm)
44.55 AU (6.665 Tm)
Eccentricity0.0573
297.40yr (108626±31d)
129°
0.003314°/day
Inclination5.198°
1.84°
1919 Feb 16 ± 37 days
304°
Knownsatellites1 confirmed, 1 suspected
Physical characteristics
331+51
−187 km (combined)
246+38
−139 km (primary)[3]
Mass(3.952±0.067)×1018 kg (system)[4]
0.30+0.50
−0.14 g/cm3[3]
0.0430+0.1825
−0.0095[3]
B−V =0.91±0.13
V−R =0.74±0.08
V−I =1.17±0.09[5]
5.77;[1]
5.4 (system), 5.1 (primary)[6]
Satellite
Discovery
Discovery date6 August 2006[6]
Orbital characteristics[4]
9904±56 km
Eccentricity0.3445±0.0045
0.047139.561 d
Inclination35.19 (retrograde)
Satellite of148780 Altjira
Physical characteristics
221+34
−125 km[3]
difference from primary: 0.7 ± 0.2[6]

148780 Altjira (provisional designation2001 UQ18) appears to be a triple or contact binary doubleclassical Kuiper belt object.[6] The secondary is large compared to the primary, approximately 246 kilometres (153 mi) vs. 221 kilometres (137 mi).[3] The lightcurve is quite flat (Δmag<0.10), which is indicative of a "quasi-spherical body with ahomogeneous surface".[7]The system mass is 4 × 1018 kg.[4]

Itscompanion was discovered on 6 August 2006, from images taken by theHubble Space Telescope.[8] The secondary's orbit has the following parameters: semi-major-axis,9904 ± 56 km; period,139.561 ± 0.047 days; eccentricity,0.3445 ± 0.0045; and inclination,35.19 ± 0.19° (retrograde). There is indirect evidence that Altjira may be an unresolvedhierarchical triple system.[9]

In 2008, Altjira was named after theArrernte creation deity,Altjira (Alchera).[1]

References

[edit]
  1. ^abcd"JPL Small-Body Database Browser: 148780 Altjira (2001 UQ18)" (2022-11-28 last obs). Retrieved2025-08-26.
  2. ^Marc W. Buie."Orbit Fit and Astrometric record for 148780". SwRI (Space Science Department). Retrieved2011-11-29.
  3. ^abcdeVilenius, E.; Kiss, C.; Mommert, M.; et al. (2014). ""TNOs are Cool": A survey of the trans-Neptunian region X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observations".Astronomy & Astrophysics.564: A35.arXiv:1403.6309.Bibcode:2014A&A...564A..35V.doi:10.1051/0004-6361/201322416.S2CID 118513049.
  4. ^abcGrundy, W. M.; Noll, K. S.; Nimmo, F.; Roe, H. G.; Buie, M. W.; Porter, S. B.; Benecchi, S. D.; Stephens, D. C.; Levison, H. F.; Stansberry, J. A. (2011). "Five new and three improved mutual orbits of transneptunian binaries".Icarus.213 (2): 678.arXiv:1103.2751.Bibcode:2011Icar..213..678G.doi:10.1016/j.icarus.2011.03.012.S2CID 9571163.
  5. ^Doressoundiram, A.; Peixinho, N.; Doucet, C.; Mousis, O.; Barucci, M. A.; Petit, J. M.; Veillet, C. (2005). "The Meudon Multicolor Survey (2MS) of Centaurs and trans-neptunian objects: extended dataset and status on the correlations reported".Icarus.174 (1):90–104.Bibcode:2005Icar..174...90D.doi:10.1016/j.icarus.2004.09.009.S2CID 122936619.
  6. ^abcdJohnston's Archive on (148780) Altjira Retrieved 2011-11-29
  7. ^Duffard, R.; Ortiz, J. L.; Thirouin, A.; Santos-Sanz, P.; Morales, N. (2009). "Transneptunian objects and Centaurs from light curves".Astronomy & Astrophysics.505 (3):1283–1295.arXiv:0910.1472.Bibcode:2009A&A...505.1283D.doi:10.1051/0004-6361/200912601.
  8. ^"IAU Minor Planet Center".minorplanetcenter.net. Retrieved2025-09-03.
  9. ^Nelsen, Maia A.; Ragozzine, Darin; Proudfoot, Benjamin C. N.; Giforos, William G.; Grundy, Will (March 2025)."Beyond Point Masses. IV. TNO Altjira is Likely a Hierarchical Triple Discovered Through Non-Keplerian Motion".The Planetary Science Journal.6 (3): 53.arXiv:2403.12786.doi:10.3847/PSJ/ad864d.

External links

[edit]
Minor planets
Asteroid
Distant minor planet
Comets
Other
Planetary
satellites of


Dwarf planet
satellites of
Minor-planet
moons
Ranked
by size
Authority control databasesEdit this at Wikidata
Stub icon

This article about acentaur (minor planet) ortrans-Neptunian object is astub. You can help Wikipedia byexpanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=148780_Altjira&oldid=1318630129"
Categories:
Hidden categories:
[8]ページ先頭
©2009-2025 Movatter.jp