1853 McElroy
| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 15 December 1957 |
| Designations | |
| (1853) McElroy | |
Named after | William D. McElroy (American biochemist)[2] |
| 1957 XE · 1930 YP 1950 NX · 1950 OM | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.70 yr (24,364 days) |
| Aphelion | 3.2153 AU |
| Perihelion | 2.9115 AU |
| 3.0634 AU | |
| Eccentricity | 0.0496 |
| 5.36 yr (1,958 days) | |
| 106.92° | |
| 0° 11m 1.68s / day | |
| Inclination | 15.759° |
| 298.77° | |
| 89.936° | |
| Physical characteristics | |
| Dimensions | 17.47±0.64 km[4] 20.89 km (derived)[3] 21.09±0.67 km[5] 21.14±1.0 km[6] 23.807±0.154[7] 24.065±0.282 km[8] |
| 8.016±0.005 h[9] 8.0229±0.0041 h (R)[10] 8.0262±0.0020 h (R)[10] | |
| 0.1937 (derived)[3] 0.197±0.032[7] 0.1986±0.0276[8] 0.2494±0.026[6] 0.261±0.018[5] 0.304±0.055[4] | |
| X[11] · C[3] | |
| 10.5[5][6][8] · 10.70[4] · 10.766±0.003 (R)[10] · 10.8[1][3] · 10.91±0.26[11] | |
1853 McElroy, provisional designation 1957 XE, is an asteroid from the outer region of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 15 December 1957, by the Indiana Asteroid Program at Goethe Link Observatory near Brooklyn, Indiana, United States, and named for American biochemist William D. McElroy.[2][12]
Orbit and classification
[edit | edit source]McElroy orbits the Sun in the outer main-belt at a distance of 2.9–3.2 AU once every 5 years and 4 months (1,958 days). Its orbit has an eccentricity of 0.05 and an inclination of 16° with respect to the ecliptic.[1]
It was first identified as 1930 YP at Lowell Observatory in 1930. However the observation remained unused and the body's observation arc begins with its official discovery in 1957.[12]
Physical characteristics
[edit | edit source]McElroy is characterized as a generic X-type and carbonaceous C-type asteroid by the Lightcurve Data Base and by PanSTARRS' photometric survey, respectively.[3][11]
Rotation period
[edit | edit source]Between 2004 and 2011, three rotational lightcurves of McElroy were obtained at Brian Warner's Palmer Divide Observatory and at the Palomar Transient Factory, respectively. Lightcurve analysis gave a rotation period between 8.016 and 8.026 hours with a brightness variation of 0.18–0.30 magnitude (U=3-/2/2).[9][10]
Diameter and albedo
[edit | edit source]According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, McElroy measures between 17.47 and 24.07 kilometers in diameter, and its surface has an albedo of 0.197 to 0.304.[4][5][6][7][8]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.194 and a diameter of 20.89 kilometers with an absolute magnitude of 10.8.[3]
Naming
[edit | edit source]This minor planet was named in honor of American biochemist William David McElroy (1917–1999), chairman of the biology department at Johns Hopkins University during the 1950s and 1960s, later director of the National Science Foundation (NSF) in the early 1970s and chancellor of the University of California at San Diego from until 1980.[2]
During his tenure as director of NSF the U.S. government decided to fund the Very Large Array, now officially known as the Karl G. Jansky Very Large Array.[2] The official naming citation was published by the Minor Planet Center on 1 August 1980 (M.P.C. 5450).[13]
References
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- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (online, AcuA catalog p. 153)
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External links
[edit | edit source]- Lightcurve plot of 1853 McElroy, Palmer Divide Observatory, B. D. Warner (2004)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- 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
- 1853 McElroy at AstDyS-2, Asteroids—Dynamic Site
- 1853 McElroy at the JPL Small-Body DatabaseLua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
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