(2047) Smetana
|
Asteroid (2047) Smetana |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Inner main belt asteroid |
| Major semi-axis | 1.8721 AU |
| eccentricity | 0.0033 |
| Perihelion - aphelion | 1.8658 AU - 1.8783 AU |
| Inclination of the orbit plane | 25.2794 ° |
| Length of the ascending node | 36.6102 ° |
| Argument of the periapsis | 303.5524 ° |
| Time of passage of the perihelion | February 2, 2020 |
| Sidereal period | 2.56 a |
| Mean orbital velocity | 21.77 km / s |
| Physical Properties | |
| Medium diameter | 3.131 km (± 0.153) |
| Albedo | 0.544 (± 0.069) |
| Rotation period | 2.4970 h (± 0.0003) |
| Absolute brightness | 14.0 mag |
| history | |
| Explorer | Luboš Kohoutek |
| Date of discovery | October 26, 1971 |
| Another name | 1971 WP 1 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(2047) Smetana is an asteroid of the main inner belt that was discovered by the Czechoslovak astronomer Luboš Kohoutek on October 26, 1971 at the Hamburg observatory in Bergedorf ( IAU code 029).
The asteroid belongs to the Hungaria group : One of the characteristics of this group is the 9: 2 orbit resonance with the planet Jupiter . The namesake for this group is the asteroid (434) Hungaria .
The eccentricity of (2047) Smetana is small with rounded 0.0033, so that its orbit around the sun comes very close to an ideal circular path. It is still significantly less than that of all planets in the solar system. For comparison, the earth's orbit has an eccentricity of 0.0167. The solar orbit of the asteroid, on the other hand, is strongly inclined at more than 25 ° to the ecliptic of the solar system . The rotation period is 2.4970 h (± 0.0003) as determined by observations by Brian D. Warner in 2009, 2006, 2011, 2013, 2016 and 2018.
The mean diameter of the asteroid was calculated to be 3.131 km (± 0.153). With an albedo of 0.544 (± 0.069) it has a very light surface.
(2047) Smetana was named on July 1, 1979 after the composer Bedřich Smetana . An impact crater on the southern hemisphere of the planet Mercury has also been named after Bedřich Smetana since 1985 : Mercury crater Smetana .
Moon S / 2013 (2047) 1
From October 31 to November 14, 2012 at the Palmer Divide Observatory in Colorado it was found in 741 photometric observations by Brian D. Warner at (2047) Smetana that the asteroid at a distance of 6.3 km has a companion who is about one fifth of his Size, 0.63 km (± 0.07). The moon needs about 0.93 days for an orbit around (2047) Smetana. Both bodies orbit a common center of gravity in 22.43 (± 0.02) hours. The companion was given the provisional designation S / 2013 (2047) 1 .
Web links
- (2047) Smetana in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2047) Smetana in the Small-Body Database of the Jet Propulsion Laboratory .
- (2047) Smetana in Johnston's Archive , last updated on September 21, 2014
Individual evidence
- ↑ a b Lightcurves from (2047) Smetana from the Palmer Divide Observatory (English)
- ^ Lutz D. Schmadel : Dictionary of Minor Planet Names . Springer-Verlag, Berlin 2012, 6th edition, ISBN 978-3-642-29717-5 . Page 159 (English)
- ↑ The Mercury Crater Smetana in the Gazetteer of Planetary Nomenclature of the IAU (WGPSN) / USGS (English)
- ^ Brian D. Warner: Seeing Double Old and New Observations and Lightcurve Analysis at the Palmer Divide Observatory of Six Binary Asteroids . The Minor Planet Bulletin 04/2013, Vol. 20, No. 2, page 94f bibcode : 2013MPBu ... 40 ... 94W (English)