Astronomy:385 Ilmatar
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| File:385 Ilmatar.png Lightcurve-base 3D-model of 385 Ilmatar. | |
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery date | 1 March 1894 |
| Designations | |
| (385) Ilmatar | |
| Named after | Ilmatar |
| 1894 AX | |
| Minor planet category | Main belt |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.12 yr (44604 d) |
| |{{{apsis}}}|helion}} | 3.19998 astronomical unit|AU (478.710 Gm) |
| |{{{apsis}}}|helion}} | 2.50226 AU (374.333 Gm) |
| 2.85112 AU (426.521 Gm) | |
| Eccentricity | 0.12236 |
| Orbital period | 4.81 yr (1758.4 d) |
| Mean anomaly | 166.647° |
| Mean motion | 0° 12m 17.024s / day |
| Inclination | 13.5514° |
| Longitude of ascending node | 345.021° |
| 187.911° | |
| Physical characteristics | |
| Mean diameter | 83.857±0.576 km[1] |
| Mass | Template:Nwr |
| Mean density | 3.136 ± 1.555/0.607 g/cm3[2] |
| Rotation period | 62.35 h (2.598 d) |
| Geometric albedo | 0.242±0.042[1] |
| S | |
| Absolute magnitude (H) | 7.85[1] |
385 Ilmatar is a large main belt asteroid.
It was discovered by Max Wolf on March 1, 1894, in Heidelberg.[3] It was named after Ilmatar, virgin spirit of the air from the Finnish epic Kalevala. Its mass has been estimated as (1.039 ± 0.515/0.201)×1018 kg.[2] Its rotation is 62.35 hr.
References
- ↑ 1.0 1.1 1.2 1.3 "385 Ilmatar (1894 AX)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=385;cad=1.
- ↑ 2.0 2.1 Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society 492 (1): 589–602. doi:10.1093/mnras/stz3407. https://academic.oup.com/mnras/article/492/1/589/5658701.
- ↑ "Physics and Astronomy > Dictionary of Minor Planet Names > (385) Ilmatar". Springer Reference. http://www.springerreference.com/docs/html/chapterdbid/125309.html.
External links
- 385 Ilmatar at AstDyS-2, Asteroids—Dynamic Site
- 385 Ilmatar at the JPL Small-Body Database
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