| Discovery | |
|---|---|
| Discovered by | K. Lohnert |
| Discovery site | Heidelberg |
| Discovery date | 17 October 1906 |
| Designations | |
| Pronunciation | German: [ɛlˈfʁiːdə]1 |
| 1906 VZ | |
| Orbital characteristics2 | |
| 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 | |
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
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
References
- (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
External links
- 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