618 Elfriede is a minor planet orbiting the Sun. On July 24, 2013, it occulted the magnitude 12.8 star 2UCAC 23949304, over parts of Mexico and southwestern United States.[3]
| Discovery | |
|---|---|
| Discovered by | K. Lohnert |
| Discovery site | Heidelberg |
| Discovery date | 17 October 1906 |
| Designations | |
| (618) Elfriede | |
| Pronunciation | German: [ɛlˈfʁiːdə][1] |
| 1906 VZ | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 109.50 yr (39996 d) |
| Aphelion | 3.4223 AU (511.97 Gm) |
| Perihelion | 2.9551 AU (442.08 Gm) |
| 3.1887 AU (477.02 Gm) | |
| Eccentricity | 0.073271 |
| 5.69 yr (2079.8 d) | |
| 142.019° | |
| 0° 10m 23.124s / day | |
| Inclination | 17.037° |
| 111.070° | |
| 228.138° | |
| Physical characteristics | |
| 60.145±2.5 km | |
| 14.795 h (0.6165 d) | |
| 0.0606±0.005 | |
| 8.3 | |
Photometric observations of this asteroid collected during 2008 show a rotation period of 14.85 ± 0.01 hours with a brightness variation of 0.12 ± 0.02 magnitude.[4]
References
edit- ^ (German Names)
- ^ "618 Elfriede (1906 VZ)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
- ^ Asteroid Occultation - (618) Elfriede
- ^ Carbo, Landy; et al. (July 2009), "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory and Oakley Observatory: 2008 September and October", The Minor Planet Bulletin, 36 (3): 91–94, Bibcode:2009MPBu...36...91C.
External links
edit- Lightcurve plot of 618 Elfriede, Palmer Divide Observatory, B. D. Warner (2006)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 618 Elfriede at AstDyS-2, Asteroids—Dynamic Site
- 618 Elfriede at the JPL Small-Body Database
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