Astronomy:1779 Paraná
| Discovery[1] | |
|---|---|
| Discovered by | M. Itzigsohn |
| Discovery site | La Plata Obs. |
| Discovery date | 15 June 1950 |
| Designations | |
| (1779) Paraná | |
| Named after | Paraná River[2] (South American river) |
| 1950 LZ · 1976 SF8 6116 P-L | |
| Minor planet category | main-belt · (inner) |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.86 yr (24,422 days) |
| |{{{apsis}}}|helion}} | 2.5262 AU |
| |{{{apsis}}}|helion}} | 1.8249 AU |
| 2.1755 AU | |
| Eccentricity | 0.1612 |
| Orbital period | 3.21 yr (1,172 days) |
| Mean anomaly | 344.02° |
| Mean motion | 0° 18m 25.92s / day |
| Inclination | 0.8987° |
| Longitude of ascending node | 254.43° |
| 11.493° | |
| Physical characteristics | |
| Dimensions | 4 km (calculated at 0.25)[3] 4.085±0.223 km[4] |
| Geometric albedo | 0.221±0.023[4] |
| Absolute magnitude (H) | 14.1[1] |
1779 Paraná, provisional designation 1950 LZ, is an asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter.
The asteroid was discovered on 15 June 1950, by Argentine astronomer Miguel Itzigsohn at the La Plata Astronomical Observatory in La Plata, capital of the province of Buenos Aires.[5] It was named for the Paraná River in South America.[2]
Orbit and classification
Paraná orbits the Sun in the inner main-belt at a distance of 1.8–2.5 AU once every 3 years and 3 months (1,172 days). Its orbit has an eccentricity of 0.16 and an inclination of 1° with respect to the ecliptic.[1]
As no precoveries were taken, and no prior identifications were made, Paraná's observation arc begins with its official discovery observation in 1950.[5] Paraná has also been cataloged by the Palomar–Leiden survey and received the survey designation 6116 P-L (PLS6116).[1][5]
Physical characteristics
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Paraná measures 4.09 kilometers in diameter and its surface has an albedo of 0.221.[4] Based on a magnitude-to-diameter conversion, using an albedo in the range of 0.05 to 0.25 and a magnitude of 14.1, the asteroid's generic diameter is between 4 and 9 kilometers.[3]
Rotation period
As of 2017, Paraná's spectral type, rotation period and shape remain unknown.[1][6]
Naming
This minor planet was named for a large and 4,880-kilometers long Paraná River that runs through northern Argentina, Brazil and Paraguay. It is a major tributary to the La Plata river, where the city of La Plata and the discovering observatory are located (also see 1029 La Plata).[2] The official naming citation was published by the Minor Planet Center on 8 April 1982 (M.P.C. 6832).[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 1779 Parana (1950 LZ)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001779.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1779) Paraná". Dictionary of Minor Planet Names – (1779) Paraná. Springer Berlin Heidelberg. p. 142. doi:10.1007/978-3-540-29925-7_1780. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 "Absolute Magnitude (H)". NASA/JPL. http://neo.jpl.nasa.gov/glossary/h.html.
- ↑ 4.0 4.1 4.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 19 December 2016.
- ↑ 5.0 5.1 5.2 "1779 Parana (1950 LZ)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1779.
- ↑ "LCDB Data for (1779) Paraná". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1779%7CParaná.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1779 Paraná at AstDyS-2, Asteroids—Dynamic Site
- 1779 Paraná at the JPL Small-Body Database
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