Haumea
in Wikipedia, die vrye ensiklopedie
 'n Kunstenaarsvoorstelling van Haumea (die afstande van sy mane is nie volgens skaal nie) |
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| Ontdekking | |
|---|---|
| Ontdek deur: | Brown et al. Ortiz et al. (geen amptelike) |
| Datum: | 28 Desember 2004 (Brown et al.) Julie 2005 (Ortiz et al.) |
| Planetoïde benaming: | (136108) Haumea |
| Alternatiewe name: | 2003 EL61 |
| Planetoïde kategorie: | dwergplaneet TNS plutoid (denoteer cubewano)[1][2] |
| Wentelbaaneienskappe[3] | |
| Epoch 30 November 2008 (JD 2454800,5) |
|
| Aphelium afstand: | 51,544 AE 7,710 Tm |
| Perihelium afstand: | 34,721 AE 5,194 Tm |
| Semi-lang as: | 43,132 AE 6,452 Tm |
| Eksentrisiteit: | 0,195 01 |
| Wentelperiode: | 283,28 jare (103 468 dae) |
| Gem. omwentelingspoed: | 4,484 km/s |
| Mean anomaly: | 202,67° |
| Inklinasie: | 28,22° |
| Lengteligging van stygende nodus: | 121,10° |
| Periheliumargument: | 239,18° |
| Natuurlike satelliete: | 2 |
| Dimensies: | ≈1 960 × 1 518 × 996 km (Keck)[4] |
| Gem. radius: | ≈718 km 575+125−50 km (Spitzer)[5] ~650 km (Herschel)[6] |
| Oppervlakte: | ≈27 km2 |
| Massa: | (4,006 ± 0,040)21 kg[7] (0,00066 Aardes) |
| Gem. digtheid: | 2,6–3,3 g/cm3[4] |
| Oppervlak- aantrekkingskrag: |
0,44 m/s2 |
| Ontsnapping- snelheid: |
0,84 km/s |
| Sideriese rotasieperiode: |
0,163 146 ± 0,000 004 d (3,915 5 ± 0,000 1 h)[8] |
| 0,7 ± 0,1[4] 0,84+0,1−0,2[5] 0,70–75[6] |
|
| Temperatuur: | <50 K[9] |
| : | B-V=0,64, V-R=0,33 B0-V0=0,646[10] |
| Skynmagnitude: | 17,3 (opposisie)[11][12] |
| Absolute magnitude: | 0,01053 ± 0,44[3] |
Haumea, amptelik (136108) Haumea, is 'n dwergplaneet in die Kuiper-gordel. Hy is in 2004 vir die eerste keer deur 'n span onder leiding van Mike Brown by die Palomar-observatorium ontdek en is op 17 September 2008 plegtig deur die Internasionale Sterrekundige Unie as 'n dwergplaneet aanvaar en na Haumea, die Hawaise godin van vrugbaarheid, vernoem.
Dit blyk dat Haumea 'n uiters verlengde vorm het, uniek onder Trans-Neptuniese Voorwerpe (TNV's). Alhoewel hierdie vorm nie direk waargeneem is nie, is berekenings van sy lugkurwe 'n ellipsoïdale vorm voorgestel.
Verwysings [wysig]
- ↑ “MPEC 2010-H75 : DISTANT MINOR PLANETS (2010 MAY 14.0 TT)”. (2006 provisional Cubewano listing) Minor Planet Center: 2010-04-10. URL besoek op 2010-07-02.
- ↑ Marc W. Buie (2008-06-25). “Orbit Fit and Astrometric record for 136108”. Southwest Research Institute (Space Science Department). URL besoek op 2008-10-02.
- ↑ 3,0 3,1 “Jet Propulsion Laboratory Small-Body Database Browser: 136108 Haumea (2003 EL61)”. NASA's Jet Propulsion Laboratory: 2008-05-10 last obs. URL besoek op 2008-06-11.
- ↑ 4,0 4,1 4,2 D. L. Rabinowitz, et al. (2006). “Photometric Observations Constraining the Size, Shape, and Albedo of 2003 EL61, a Rapidly Rotating, Pluto-Sized Object in the Kuiper Belt”. Astrophysical Journal 639 (2): 1238–1251. DOI:10.1086/499575.
- ↑ 5,0 5,1 J. Stansberry, W. Grundy, M. Brown, et al. (2008). “Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope”. The Solar System beyond Neptune.
- ↑ 6,0 6,1 E. Lollouch, et al. (2010). “"TNOs are cool": A survey of the trans-Neptunian region II. The thermal lightcurve of (136108) Haumea”. Astronomy and Astrophysics 518. DOI:10.1051/0004-6361/201014648.
- ↑ D. Ragozzine , M. E. Brown (2009). “Orbits and Masses of the Satellites of the Dwarf Planet Haumea = 2003 EL61”. The Astronomical Journal 137 (6): 4766. DOI:10.1088/0004-6256/137/6/4766.
- ↑ P. Lacerda, D. Jewitt and N. Peixinho (2008). “High-Precision Photometry of Extreme KBO 2003 EL61”. Astronomical Journal 135 (5): 1749–1756. DOI:10.1088/0004-6256/135/5/1749.
- ↑ Chadwick A. Trujillo, Michael E. Brown, Kristina Barkume, Emily Shaller, David L. Rabinowitz (2007). “The Surface of 2003 EL61 in the Near Infrared”. Astrophysical Journal 655 (2): 1172–1178. DOI:10.1086/509861.
- ↑ D. L. Rabinowitz et al. (2008). “The Youthful Appearance of the 2003 EL61 Collisional Family”. The Astronomical Journal 136 (4): 1502. DOI:10.1088/0004-6256/136/4/1502.
- ↑ “AstDys (136108) Haumea Ephemerides”. Department of Mathematics, University of Pisa, Italy. URL besoek op 2009-03-19.
- ↑ “HORIZONS Web-Interface”. NASA Jet Propulsion Laboratory Solar System Dynamics. URL besoek op 2008-07-02.
| Die sonnestelsel |
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| Son • Mercurius • Venus • Aarde • Mars • Ceres • Jupiter • Saturnus • Uranus • Neptunus • Pluto • Haumea • Makemake • Eris |
| Mane: Aarde • Mars • Asteroïdies • Jupiter • Saturnus • Uranus • Neptunus • Pluto • Haumea • Eris • Ringe: Jupiter • Saturnus • Uranus • Neptunus |
| Planete • Dwergplanete • Kleinplanete Meteoroïdes • Asteroïdes • Asteroïdegordel • Sentoure • Trans-Neptunus-voorwerpe • Kuiper-gordel • Verstrooide skyf • Komete • Hills-wolk • Oort-wolk |
