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557 Violetta 
Summary
Violetta (minor planet designation: 557 Violetta) is a minor planet orbiting the Sun that was discovered by German astronomer Max Wolf on 26 January 1905 in Heidelberg. In light of M. F. Wolf's penchant ca. 1905 for naming asteroids after operatic heroines, it is likely that 557 Violetta is named after the protagonist of Giuseppe Verdi's famous opera La Traviata.
| Discovery | |
|---|---|
| Discovered by | M. F. Wolf |
| Discovery site | Heidelberg |
| Discovery date | 26 January 1905 |
| Designations | |
| (557) Violetta | |
| Pronunciation | Italian: [vjoˈletta][1] |
| 1905 PY | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.25 yr (40634 d) |
| Aphelion | 2.6867 AU (401.92 Gm) |
| Perihelion | 2.1984 AU (328.88 Gm) |
| 2.4425 AU (365.39 Gm) | |
| Eccentricity | 0.099957 |
| 3.82 yr (1394.3 d) | |
| 79.8798° | |
| 0° 15m 29.484s / day | |
| Inclination | 2.4895° |
| 292.818° | |
| 195.130° | |
| Physical characteristics | |
| 5.0887 h (0.21203 d)[2][3] | |
| 12.1 | |
Photometric observations of this asteroid made during 2008 at the Organ Mesa Observatory in Las Cruces, New Mexico, gave a light curve with a period of 5.0887 ± 0.0001 hours and a brightness variation of 0.25 ± 0.03 in magnitude.[3]
References edit
- ^ violetta (Dizionario Rai)
- ^ a b Yeomans, Donald K., "557 Violetta", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 5 May 2016.
- ^ a b Pilcher, Frederick (September 2008), "Period Determinations for 26 Proserpina, 34 Circe 74 Galatea, 143 Adria, 272 Antonia, 419 Aurelia, and 557 Violetta", The Minor Planet Bulletin, vol. 35, no. 3, pp. 135–138, Bibcode:2008MPBu...35..135P.
External links edit
- 557 Violetta at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- 557 Violetta at the JPL Small-Body Database
