3066 McFadden

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3066 McFadden
Discovery [1]
Discovered byE. Bowell
Discovery siteAnderson Mesa Stn.
Discovery date1 March 1984
MPC designation(3066) McFadden
Named after
Lucy-Ann McFadden[1]
(American astronomer)
1984 EO · 1933 MA
1936 FE · 1941 MA
1952 FW · 1968 FQ
1976 GC · 1980 EG2
main-belt[1][2] · (inner)[3]
Orbital characteristics[2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc81.60 yr (29,806 d)
Aphelion2.8636 AU
Perihelion2.1875 AU
2.5255 AU
4.01 yr (1,466 d)
0° 14m 44.16s / day
Physical characteristics
Mean diameter
13.526±0.046 km[5]
14.805±0.051 km[6]
14.896 km[7]
14.90 km (taken)[3]
15.27±0.53 km[8]
15.63±0.44 km[9]
13.798±0.002 h[10][a]
S (assumed)[3]
11.10[8] · 11.20[2][9]

3066 McFadden, provisional designation 1984 EO, is a stony background asteroid from the central regions of the asteroid belt, approximately 15 kilometers (9.3 miles) in diameter. It was discovered on 1 March 1984, by American astronomer Edward Bowell at the Anderson Mesa Station near Tucson, Arizona. It was named for American planetary scientist Lucy-Ann McFadden.[1] The assumed S-type asteroid has a rotation period of 13.8 hours.[3][a]

Orbit and classification[edit]

McFadden is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the central asteroid belt at a distance of 2.2–2.9 AU once every 4 years (1,466 days; semi-major axis of 2.53 AU). Its orbit has an eccentricity of 0.13 and an inclination of 16° with respect to the ecliptic.[2]

The asteroid was first observed as 1933 MA at the Simeis Observatory in June 1933. The body's observation arc begins as 1936 FE at Uccle Observatory in March 1936, or 48 years prior to its official discovery observation at Anderson Mesa.[1]


This minor planet was named after Lucy-Ann McFadden (born 1952), a planetary scientist at the University of Maryland at the time of naming. Her research included the similarities between the spectra of meteorites and near-Earth objects.[1] The official naming citation was published by the Minor Planet Center on 14 April 1987 (M.P.C. 11748).[13]

Physical characteristics[edit]

McFadden is an assumed, stony S-type asteroid.[3]

Rotation period[edit]

In June 2005, a rotational lightcurve of McFadden was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Observatory in Colorado. Lightcurve analysis gave a rotation period of 13.798 hours with a brightness amplitude of 0.13 magnitude (U=3).[10][a]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, McFadden measures between 13.526 and 15.63 kilometers in diameter and its surface has an albedo between 0.240 and 0.363.[5][6][7][8][9]

The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE data with an albedo of 0.2541 and a diameter of 14.90 kilometers based on an absolute magnitude of 11.24.[3][7]


  1. ^ a b c Lightcurve plot of 3066 McFadden, Palmer Divide Observatory, B. D. Warner (2005) rotation period of 13.798±0.002 hours with a brightness amplitude of 0.13±0.02 mag. Quality code of 3. Summary figures at the LCDB and publication.[10]


  1. ^ a b c d e f "3066 McFadden (1984 EO)". Minor Planet Center. Retrieved 27 March 2018.
  2. ^ a b c d "JPL Small-Body Database Browser: 3066 McFadden (1984 EO)" (2017-10-28 last obs.). Jet Propulsion Laboratory. Retrieved 27 March 2018.
  3. ^ a b c d e f g "LCDB Data for (3066) McFadden". Asteroid Lightcurve Database (LCDB). Retrieved 27 March 2018.
  4. ^ a b "Asteroid 3066 McFadden – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
  5. ^ 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" (PDF). The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 27 March 2018.
  6. ^ 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 27 March 2018.
  7. ^ a b c d e Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved 27 March 2018.
  8. ^ 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 27 March 2018.
  9. ^ 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". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
  10. ^ a b c Warner, Brian D. (December 2005). "Asteroid lightcurve analysis at the Palmer Divide Observatory - spring 2005". The Minor Planet Bulletin. 32 (4): 90–92. Bibcode:2005MPBu...32...90W. ISSN 1052-8091. Retrieved 27 March 2018.
  11. ^ Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 27 March 2018.
  12. ^ 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 27 March 2018.
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 March 2018.

External links[edit]