4082 Swann

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4082 Swann
Discovery [1]
Discovered byC. Shoemaker
Discovery sitePalomar Obs.
Discovery date27 September 1984
MPC designation(4082) Swann
Named after
Gordon A. Swann
(American geologist)[2]
1984 SW3 · 1947 UF
1969 PE
main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc69.54 yr (25,399 days)
Aphelion3.0076 AU
Perihelion1.7721 AU
2.3899 AU
3.69 yr (1,349 days)
0° 16m 0.48s / day
Physical characteristics
Dimensions5.85 km (derived)[3]
9.535±0.066 km[4]
11.06±0.29 km[5]
4.03632±0.00009 h[a]
4.1±0.1 h[6]
0.20 (assumed)[3]
SMASS = Ch [1] · C[3]
12.90[5] · 13.08±0.2 (R)[a] · 13.4[1] · 13.46±0.206[3][7] · 13.58±0.27[8] · 14.55[4]

4082 Swann, provisional designation 1984 SW3, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter.

The asteroid was discovered on 27 September 1984, by American astronomer Carolyn Shoemaker at Palomar Observatory in California, United States, and later named for American geologist Gordon Swann.[2][9]

Orbit and classification[edit]

Swann orbits the Sun in the inner main-belt at a distance of 1.8–3.0 AU once every 3 years and 8 months (1,349 days). Its orbit has an eccentricity of 0.26 and an inclination of 10° with respect to the ecliptic.[1] First identified as 1947UF at the Finnish Turku Observatory in 1947, Swann's observation arc was extended by 37 years prior to its official discovery observation at Palomar.[9]

Physical characteristics[edit]

The C-type asteroid is classified as a Ch-subtype in the SMASS taxonomy.[1]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Swann measures 9.5 and 11.1 kilometers in diameter and its surface has an albedo of 0.029 and 0.101, respectively.[4][5] The Collaborative Asteroid Lightcurve Link, however, assumes a standard albedo for stony asteroids of 0.20 and derives a much smaller diameter of 5.85 kilometers, based on an absolute magnitude of 13.46.[3]

Rotation period[edit]

In July 2006, a rotational lightcurve of Swann was obtained from photometric observations by Petr Pravec at the Ondřejov Observatory in the Czech Republic. It gave a rotation period of 4.03632±0.00009 hours with a brightness variation of 0.67 magnitude (U=3).[a] A second lightcurve obtained by Jean-Gabriel Bosch in September 2006, gave a period of 4.1±0.1 hours and an amplitude of 0.35 magnitude (U=2).[6]


This minor planet was named after American geologist Gordon A. Swann (born 1931). He served as the principal investigator of the "Apollo Lunar Geologic Experiment" conducted at the lunar landing sites of Apollo 14 and Apollo 15.[2] The official naming citation was published by the Minor Planet Center on 12 December 1989 (M.P.C. 15576).[10]


  1. ^ a b c Pravec (2006) web: rotation period of 4.03632±0.00009 hours with a brightness amplitude of 0.67 mag. Summary figures for (4082) Swann at Collaborative Asteroid Lightcurve Link (CALL) and Pravec, P.; Wolf, M.; Sarounova, L. (2006)


  1. ^ a b c d e f "JPL Small-Body Database Browser: 4082 Swann (1984 SW3)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 19 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(4082) Swann". Dictionary of Minor Planet Names – (4082) Swann. Springer Berlin Heidelberg. p. 348. doi:10.1007/978-3-540-29925-7_4060. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (4082) Swann". Asteroid Lightcurve Database (LCDB). Retrieved 30 October 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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 30 October 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". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 30 October 2016.
  6. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (4082) Swann". Geneva Observatory. Retrieved 30 October 2016.
  7. ^ 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 17 December 2015.
  8. ^ 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 30 October 2016.
  9. ^ a b "4082 Swann (1984 SW3)". Minor Planet Center. Retrieved 30 October 2016.
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 October 2016.

External links[edit]