Open main menu

5806 Archieroy, provisional designation 1986 AG1, is a stony Hungaria asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 11 January 1986, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona.[3] It is named after Scottish astrophysicist Archie Roy.[2]

5806 Archieroy
Discovery [1]
Discovered byE. Bowell
Discovery siteLowell Obs.
Discovery date11 January 1986
MPC designation(5806) Archieroy
Named after
Archie Roy
1986 AG1 · 1987 QQ9
main-belt · (inner)[1]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc62.83 yr (22,948 days)
Aphelion2.0347 AU
Perihelion1.8908 AU
1.9628 AU
2.75 yr (1,004 days)
0° 21m 30.24s / day
Physical characteristics
Dimensions5.75±1.02 km[5]
6.34±1.34 km[6]
6.38 km (calculated)[4]
6.785±0.224 km[7]
12.16±0.01 h[8]
12.1602±0.0005 h[9]
12.163±0.001 h[10]
12.187±0.003 h[11]
0.3 (assumed)[4]
E[4] · V[12]
12.80[7] · 12.9[1][4][5] · 13.53[6]


Classification and orbitEdit

The bright E-type asteroid, alternatively classified as a V-type, is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun in the inner main-belt at a distance of 1.9–2.0 AU once every 2 years and 9 months (1,004 days). Its orbit has an eccentricity of 0.04 and an inclination of 21° with respect to the ecliptic.[1] A first precovery was taken at Palomar Observatory in 1954, extending the asteroid's observation arc by 32 years prior to its official discovery observation at Anderson Mesa.[3]


Between 2004 and 2015, several rotational lightcurves of Archieroy have been obtained from photometric observations by American astronomers Brian Warner at his Palmer Divide Observatory, Colorado, and Robert Stephens at the Center for Solar System Studies, California. Lightcurve analysis[a] gave a well-defined rotation period between 12.16 and 12.187 hours with a high brightness variation of 0.34 to 0.47 magnitude (U=3-/3/3/3).[8][9][10][11]

Diameter and albedoEdit

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Archieroy measures between 5.75 and 6.78 kilometers in diameter, and its surface has an albedo between 0.19 and 0.37,[5][6][7] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 – a compromise value between 0.4 and 0.2, corresponding to the Hungaria asteroids both as family and orbital group – and calculates a diameter of 6.38 kilometers, with an absolute magnitude of 12.9.[4]


This minor planet was named after Scottish astrophysicist and celestial mechanician Archie Roy (1924–2012), who was a Fellow of the Royal Society of Edinburgh, the Royal Astronomical Society, and the British Interplanetary Society, as well as the president of the Society for Psychical Research and professor at Glasgow University. His research included the restricted and general three-body problems, high-order Taylor series and the long-term stability of and the orbital resonances in the Solar System. He has also authored and published several textbooks and novels.[2] The approved naming citation was published by the Minor Planet Center on 19 October 1994 (M.P.C. 24123).[13]


  1. ^ lightcurve plots by Brian Warner and Robert Stephens of (5806) Archieroy


  1. ^ a b c d e "JPL Small-Body Database Browser: 5806 Archieroy (1986 AG1)" (2017-05-01 last obs.). Jet Propulsion Laboratory. Retrieved 4 July 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(5806) Archieroy". Dictionary of Minor Planet Names – (5806) Archieroy. Springer Berlin Heidelberg. p. 490. doi:10.1007/978-3-540-29925-7_5459. ISBN 978-3-540-00238-3.
  3. ^ a b c "5806 Archieroy (1986 AG1)". Minor Planet Center. Retrieved 21 March 2017.
  4. ^ a b c d e f "LCDB Data for (5806) Archieroy". Asteroid Lightcurve Database (LCDB). Retrieved 21 March 2017.
  5. ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 21 March 2017.
  6. ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 21 March 2017.
  7. ^ 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 21 March 2017.
  8. ^ a b Warner, Brian D. (June 2005). "Asteroid lightcurve analysis at the Palmer Divide Observatory - fall 2004". The Minor Planet Bulletin. 32 (2): 29–32. Bibcode:2005MPBu...32...29W. ISSN 1052-8091. Retrieved 21 March 2017.
  9. ^ a b Warner, Brian D. (April 2013). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2012 September - 2013 January". The Minor Planet Bulletin. 40 (2): 71–80. Bibcode:2013MPBu...40...71W. ISSN 1052-8091. Retrieved 21 March 2017.
  10. ^ a b Warner, Brian D. (September 2008). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: December 2007 - March 2008". The Minor Planet Bulletin. 35 (3): 95–98. Bibcode:2008MPBu...35...95W. ISSN 1052-8091. Retrieved 21 March 2017.
  11. ^ a b Stephens, Robert D. (April 2016). "Asteroids Observed from CS3: 2015 October - December". The Minor Planet Bulletin. 43 (2): 158–159. Bibcode:2016MPBu...43..158S. ISSN 1052-8091. Retrieved 21 March 2017.
  12. ^ Fornasier, S.; Migliorini, A.; Dotto, E.; Barucci, M. A. (July 2008). "Visible and near infrared spectroscopic investigation of E-type asteroids, including 2867 Steins, a target of the Rosetta mission". Icarus. 196 (1): 119–134. Bibcode:2008Icar..196..119F. doi:10.1016/j.icarus.2008.02.015. Retrieved 22 March 2017.
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 21 March 2017.

External linksEdit