2 Pallas
asteroid
2 Pallas (basa Yunani: Παλλάς) wujud asteroid gedhé sing ana ing sabuk asteroid sistem tata surya lan wujud asteroid angka 2 sing tinemu. Ditemokaké lan dijenengi déning astronom Heinrich Wilhelm Matthaus Olbers nalika tanggal 28 Maret 1802. 2 Pallas wujud salah siji saka 4 asteroid gedhé (1 Ceres, 4 Vesta, 10 Hygiea, lan 2 Pallas). Asteroid gedhé mau ora kalebu 704 Interamnia. Pallas duwé dhiamèter 530 km[2], luwih gedhé sethithik saka 4 Vesta.
 Citra ultraviolet saka Pallas sing dijupuk saka Teleskop Hubble. |
|
Panemon
| |
|---|---|
| Panemu | Heinrich Wilhelm Olbers |
| Tanggal ditemokaké | 28 Maret 1802 |
Penamaan
| |
| Kategori planet minor |
kulawarga 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 Babagan invariabel[3] |
| Bujur node menaik | 173,134° |
| Argumen perihelion | 310,274° |
Ciri-ciri fisik
| |
| 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 | sakiwa-tengené 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" |
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Réferènsi besut
- ↑ OED
- ↑ a b c "JPL Small-Body Database Browser: 2 Pallas". Dibukak ing 2009-09-12.
- ↑ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. Diarsip saka sing asli ing 2012-04-17. Dibukak ing 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. Dibukak ing 2008-08-24.
{{cite journal}}: Explicit use of et al. in:|author=(pitulung) - ↑ 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. Diarsip saka sing asli (PDF) ing 2011-02-24. Dibukak ing 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. Diarsip saka asliné ing 2007-01-28. Dibukak ing 2007-03-15.
{{cite web}}: CS1 maint: multiple names: authors list (link) - ↑ 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.
{{cite journal}}: Explicit use of et al. in:|author=(pitulung) - ↑ 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. Diarsip saka asliné ing 2007-03-11. Dibukak ing 2007-03-15.
{{cite web}}: CS1 maint: multiple names: authors list (link) - ↑ Neese, C.; Ed. (2005). "Asteroid Taxonomy. EAR-A-5-DDR-Taxonomy-V5.0". NASA Planetary Data System. Diarsip saka asliné ing 2007-03-10. Dibukak ing 2007-03-15.
- ↑
Menzel, Donald H.; Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (édhisi ka-2nd). Boston, MA: Houghton Mifflin. kc. 391. ISBN 0-395-34835-8.
{{cite book}}: CS1 maint: multiple names: authors list (link) - ↑ Calculated with JPL Horizons for 2014-Feb-24
Cathetan sikil besut
Pranala njaba besut
- "2 Pallas". JPL Small-Body Database Browser. Dibukak ing 2007-03-29.
- 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. Dibukak ing 2007-03-15.
{{cite journal}}: Check date values in:|year=(pitulung)CS1 maint: multiple names: authors list (link) - Hilton, James L. (April 1, 1999). "U.S. Naval Observatory Ephemerides of the Largest Asteroids". U.S. Naval Observatory. Diarsip saka sing asli ing 2011-07-23. Dibukak ing 2007-03-14.
{{cite web}}: Check date values in:|date=(pitulung) - Dunn, Tony (2006). "Ceres, Pallas Vesta and Hygeia". GravitySimulator.com. Dibukak ing 2007-03-15.
{{cite web}}: Check date values in:|year=(pitulung) - Yeomans, Donald K. "Horizons system". NASA JPL. Dibukak ing 2007-03-20. — Horizons can be used to obtain a current ephemeris.
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