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]
- ↑ 1.0 1.1 Yeomans, Donald K., "140 Siwa", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ↑ 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.
- ↑ 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/0312638
, doi:10.1016/j.newast.2003.12.005.
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