1853 McElroy

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1853 McElroy
Discovery [1]
Discovered by Indiana University
(Indiana Asteroid Program)
Discovery site Goethe Link Obs.
Discovery date 15 December 1957
Designations
MPC designation 1853 McElroy
Named after
William D. McElroy (biochemist)[2]
1957 XE · 1930 YP
1950 NX · 1950 OM
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 65.52 yr (23,932 days)
Aphelion 3.2159 AU
Perihelion 2.9115 AU
3.0637 AU
Eccentricity 0.0497
5.36 yr (1,959 days)
70.046°
0° 11m 1.68s / day
Inclination 15.758°
298.77°
90.032°
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.[12]

McElroy is classified as a generic X-type and carbonaceous C-type asteroid by the LCDB and PanSTARRS, respectively.[3][11] It orbits the Sun at a distance of 2.9–3.2 AU once every 5 years and 4 months (1,959 days). Its orbit has an eccentricity of 0.05 and an inclination of 16° with respect to the ecliptic.[1] McElroy 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]

Between 2004 and 2011, three roational light-curves of were obtained at Brian D. Warner's Palmer Divide Observatory and at the Palomar Transient Factory, respectively. They 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]

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 based on an absolute magnitude of 10.8.[3]

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. 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] Naming citation was published on 1 August 1980 (M.P.C. 5450).[13]

References[edit]

  1. ^ a b c d "JPL Small-Body Database Browser: 1853 McElroy (1957 XE)" (2016-01-22 last obs.). Jet Propulsion Laboratory. Retrieved 13 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1853) McElroy. Springer Berlin Heidelberg. p. 149. ISBN 978-3-540-00238-3. Retrieved 13 December 2016. 
  3. ^ a b c d e f g "LCDB Data for (1853) McElroy". Asteroid Lightcurve Database (LCDB). Retrieved 13 December 2016. 
  4. ^ a b c d 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. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 13 December 2016. 
  5. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 13 December 2016. 
  6. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 13 December 2016. 
  7. ^ a b c 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. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 13 December 2016. 
  8. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 13 December 2016. 
  9. ^ a b Warner, Brian D. (March 2005). "Lightcurve analysis for asteroids 242, 893, 921, 1373, 1853, 2120, 2448 3022, 6490, 6517, 7187, 7757, and 18108". The Minor Planet Bulletin. 32 (1): 4–7. Bibcode:2005MPBu...32....4W. ISSN 1052-8091. Retrieved 13 December 2016. 
  10. ^ a b c d Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 13 December 2016. 
  11. ^ a b c Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 13 December 2016. 
  12. ^ a b "1853 McElroy (1957 XE)". Minor Planet Center. Retrieved 13 December 2016. 
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 13 December 2016. 

External links[edit]