140 Siwa

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140 Siwa
Ìkọ́kọ́wárí and designation
Kíkọ́kọ́wárí látọwọ́ Johann Palisa
Ọjọ́ ìkọ́kọ́wárí 13 October 1874
Ìfúnlọ́rúkọ
Minor planet
category
Main belt
Àsìkò 31 July 2016 (JD 2457600.5)
Aphelion 3.3224 AU (497.02 Gm)
Perihelion 2.14323 AU (320.623 Gm)
Semi-major axis 2.73283 AU (408.826 Gm)
Eccentricity 0.21575
Àsìkò ìgbàyípo 4.52 yr (1650.1 d)
Average orbital speed 17.80 km/s
Mean anomaly 200.674°
Inclination 3.1860°
Longitude of ascending node 107.263°
Argument of perihelion 196.711°
Ẹ̀gbẹ̀ẹ̀gbẹ́ 109.79±3.0 km
Àkójọ 1.4 × 1018 kg
Equatorial surface gravity 0.0307 m/s²
Equatorial escape velocity 0.0580 km/s
Rotation period 34.445 h (1.4352 d)[1]
34.407 h[2]
Geometric albedo 0.0676±0.004
Ìgbónásí ~168 K
Spectral type C-type asteroid[3]
Absolute magnitude (H) 8.34

140 Siwa jẹ́ ìgbàjá ìsọ̀gbé oòrùn kékeré dúdú tí ó sì fẹ̀ tí Johann Palisa ọmọ orílẹ̀ èdè Australia ṣàwárí rẹ̀ ní Ọjọ́ kẹtàlá Oṣù kẹ́wá Ọdún 1874 tí ó sì pe orúkọ rẹ̀ ní Šiwa, òrìṣà àbíyè.

Àwọn ìtọ́kasí[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. 1.0 1.1 Yeomans, Donald K., "140 Siwa", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  2. Pilcher, Frederick (April 2011), "Rotation Period Determinations for 25 Phocaea, 140 Siwa, 149 Medusa 186 Celuta, 475 Ocllo, 574 Reginhild, and 603 Timandra", The Minor Planet Bulletin, 38 (2), pp. 76–78, Bibcode:2011MPBu...38...76P. 
  3. Birlan, Mirel; et al. (April 2004), "Near-IR spectroscopy of asteroids 21 Lutetia, 89 Julia, 140 Siwa, 2181 Fogelin and 5480 (1989YK8), potential targets for the Rosetta mission; remote observations campaign on IRTF", New Astronomy, 9 (5), pp. 343–351, Bibcode:2004NewA....9..343B, arXiv:astro-ph/0312638Freely accessible, doi:10.1016/j.newast.2003.12.005.