2 Pallas
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Citra ultraviolet saka Pallas sing dijupuk saka Teleskop Hubble.
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Panemon
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| Panemu | Heinrich Wilhelm Olbers |
| Tanggal ditemokaké | 28 Maret 1802 |
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Penamaan
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| Kategori planet minor |
Keluwarga Pallas |
| Adjektif | Palladian[1] |
| Epos 22 Agustus 2008 (Dina Julian 2454700,5) | |
| Aphelion | 3,412 SA (510,468 Gm) |
| Perihelion | 2,132 SA (319,005 Gm) |
| Sumbu semi-mayor | 2,772 SA (414,737 Gm) |
| Eksentrisitas | 0,231 |
| Periode orbit | 4,62 a (1686,044 dina) |
| Kecepatan orbit rata-rata | 17,65 km/dtk |
| Anomali rata-rata | 306,605° |
| Inklinasi | 34,838° menyang Ekliptika 34,21° menyang Bidang invariabel[3] |
| Bujur node menaik | 173,134° |
| Argumen perihelion | 310,274° |
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Ciri-ciri fisik
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| Dimensi | 582×556×500±18 km[4] 544 km (rata-rata)[2] |
| Massa | (2,11±0,26)×1020 kg[5] |
| Kepadatan rata-rata | ~2,8 g/cm³[4] |
| Gravitasi permukaan di khatulistiwa | ~0,18 m/s² |
| Kecepatan lepas | ~0,32 km/s |
| Periode rotasi | 0,325 55 dina (7,8132 jam)[6] |
| Kemiringan sumbu | sekitar 78 ± 13°[7] |
| Albedo | 0,159 (géomètrik)[8] |
| Suhu | ~164 K maks: ~265 K (-8 °C) |
| Kelas spektrum | Asteroid tipe B[9] |
| Magnitudo tampak | 6,4[10] tekan 10,6 |
| Magnitudo mutlak (H) | 4,13[8] |
| Ukuran sudut | 0,59"[11] tekan 0,17" |
2 Pallas (IPA: /ˈpæləs/, basa Yunani: Παλλάς) arupa asteroid gedhé sing ana ing sabuk asteroid sistem tata surya lan arupa asteroid ka-2 sing ditemokaké. Ditemokaké lan dijenengi déning astronom Heinrich Wilhelm Matthaus Olbers nalika tanggal 28 Maret 1802. 2 Pallas arupa salah siji saka 4 asteroid gedhé (1 Ceres, 4 Vesta, 10 Hygiea, lan 2 Pallas). Asteroid gedhé kasebut ora kalebu 704 Interamnia. Pallas duwé dhiamèter 530 km[2], luwih gedhé sethithik saka 4 Vesta.
Réferènsi [sunting]
- ^ OED
- ^ a b c "JPL Small-Body Database Browser: 2 Pallas". http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2. Retrieved 2009-09-12.
- ^ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. Archived from the original on 2009-05-14. http://home.surewest.net/kheider/astro/MeanPlane.gif. Retrieved 2009-04-10. (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane). Retrieved 2009-04-25.
- ^ a b Schmidt, B. E., et al. (2008). "Hubble takes a look at Pallas: Shape, size, and surface" (PDF). 39th Lunar and Planetary Science Conference (Lunar and Planetary Science XXXIX). Held March 10–14, 2008, in League City, Texas. 1391: 2502. http://www.lpi.usra.edu/meetings/lpsc2008/pdf/2502.pdf. Retrieved 2008-08-24.
- ^ Baer, James; Steven R. Chesley (2008). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris" (PDF). Celestial Mechanics and Dynamical Astronomy (Springer Science+Business Media B.V. 2007) 100 (2008): 27–42. Bibcode 2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8. http://www.springerlink.com/content/h747307j43863228/fulltext.pdf. Retrieved 2008-11-11.
- ^ Harris, A. W.; Warner, B. D.; Pravec, P.; Eds. (2006). "Asteroid Lightcurve Derived Data. EAR-A-5-DDR-Derived-Lightcurve-V8.0.". NASA Planetary Data System. Archived from the original on 2007-01-28. http://web.archive.org/web/20070128183706/http://www.psi.edu/pds/resource/lc.html. Retrieved 2007-03-15.
- ^ Torppa, J.; et al. (2003). "Shapes and rotational properties of thirty asteroids from photometric data". Icarus 164 (2): 346–383. Bibcode 2003Icar..164..346T. doi:10.1016/S0019-1035(03)00146-5.
- ^ a b Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (2004). "IRAS Minor Planet Survey. IRAS-A-FPA-3-RDR-IMPS-V6.0.". NASA Planetary Data System. Archived from the original on 2007-03-11. http://web.archive.org/web/20070311123634/http://www.psi.edu/pds/resource/imps.html. Retrieved 2007-03-15.
- ^ Neese, C.; Ed. (2005). "Asteroid Taxonomy. EAR-A-5-DDR-Taxonomy-V5.0.". NASA Planetary Data System. Archived from the original on 2007-03-10. http://web.archive.org/web/20070310220044/http://www.psi.edu/pds/resource/taxonomy.html. Retrieved 2007-03-15.
- ^ Menzel, Donald H.; Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0-395-34835-8.
- ^ Calculated with JPL Horizons for 2014-Feb-24
Cathetan sikil [sunting]
Pranala njaba [sunting]
- "2 Pallas". JPL Small-Body Database Browser. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2. Retrieved 2007-3-29.
- Tedesco, Edward F.; Noah, Paul V.; Noah, Meg; Price, Stephan D. (2002). "The Supplemental IRAS Minor Planet Survey". The Astronomical Journal 123 (2): 1056-1085. http://adsabs.harvard.edu/abs/2002AJ....123.1056T. Retrieved 2007-3-15.
- Hilton, James L. (April 1, 1999). "U.S. Naval Observatory Ephemerides of the Largest Asteroids". U.S. Naval Observatory. http://aa.usno.navy.mil/publications/reports/asteroid_ephemerides.html. Retrieved 2007-3-14.
- Dunn, Tony (2006). "Ceres, Pallas Vesta and Hygeia". GravitySimulator.com. http://orbitsimulator.com/gravity/articles/ceres.html. Retrieved 2007-3-15.
- Yeomans, Donald K.. "Horizons system". NASA JPL. http://ssd.jpl.nasa.gov/?horizons. Retrieved 2007-3-20. — Horizons can be used to obtain a current ephemeris.
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