Astronomy:2032 Ethel
| Discovery [1] | |
|---|---|
| Discovered by | T. Smirnova |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 30 July 1970 |
| Designations | |
| (2032) Ethel | |
| Named after | Ethel Voynich (Irish writer)[2] |
| 1970 OH · 1952 DU 1960 WM · 1965 UG1 1971 UD3 | |
| Minor planet category | main-belt · (outer) background [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 65.18 yr (23,807 days) |
| |{{{apsis}}}|helion}} | 3.4615 AU |
| |{{{apsis}}}|helion}} | 2.6831 AU |
| 3.0723 AU | |
| Eccentricity | 0.1267 |
| Orbital period | 5.39 yr (1,967 days) |
| Mean anomaly | 269.94° |
| Mean motion | 0° 10m 58.8s / day |
| Inclination | 1.5097° |
| Longitude of ascending node | 30.178° |
| 295.71° | |
| Physical characteristics | |
| Dimensions | 36.007±0.105 km[4] |
| Geometric albedo | 0.034±0.005[5] |
| Absolute magnitude (H) | 11.4[1] |
2032 Ethel, provisional designation 1970 OH, is a dark background asteroid from the outer regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 30 July 1970, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[6] The asteroid was named after Irish writer Ethel Voynich.[2]
Orbit and classification
Ethel is a non-family asteroid of the main belt's background population.[3] It orbits the Sun in the outer asteroid belt at a distance of 2.7–3.5 AU once every 5 years and 5 months (1,967 days; semi-major axis 3.07 AU). Its orbit has an eccentricity of 0.13 and an inclination of 2° with respect to the ecliptic.[1]
The body's observation arc begins with it identification as 1952 DU at Goethe Link Observatory in February 1952, more than 18 years prior to its official discovery observation Nauchnyj.[6]
Physical characteristics
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ethel measures 36.007 kilometers in diameter and its surface has an albedo of 0.034.[4][5]
Rotation period
As of 2017, no rotational lightcurve of Ethel has been obtained from photometric observations. The body's rotation period, poles and shape remain unknown.[1][7]
Naming
This minor planet was named after Ethel Lilian Voynich (1864–1960), an Irish writer of the late Victorian epoch, best known for her novel The Gadfly.[2] The official naming citation was published by the Minor Planet Center on 1 September 1978 (M.P.C. 4482).[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 2032 Ethel (1970 OH)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002032. Retrieved 5 December 2017.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(2032) Ethel". Dictionary of Minor Planet Names – (2032) Ethel. Springer Berlin Heidelberg. p. 165. doi:10.1007/978-3-540-29925-7_2033. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 "Asteroid 2032 Ethel – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=2032.
- ↑ 4.0 4.1 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M.
- ↑ 5.0 5.1 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 5 December 2017.
- ↑ 6.0 6.1 "2032 Ethel (1970 OH)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2032. Retrieved 5 December 2017.
- ↑ "LCDB Data for (2032) Ethel". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2032%7CEthel. Retrieved 5 December 2017.
- ↑ Schmadel, Lutz D.. "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.
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
- 2032 Ethel at AstDyS-2, Asteroids—Dynamic Site
- 2032 Ethel at the JPL Small-Body Database
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