5635 Cole

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5635 Cole
005635-asteroid shape model (5635) Cole.png
Shape model of Cole from its lightcurve
Discovery [1]
Discovered byS. J. Bus
Discovery siteSiding Spring Obs.
Discovery date2 March 1981
Designations
MPC designation
(5635) Cole
Named after
Joshua Cole [1]
(fictional character)
1981 ER5 · 1986 XC5
1988 CO5
Minor planet category
main-belt [1][2] · (inner)
background [3]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc37.20 yr (13,588 d)
Aphelion3.0272 AU
Perihelion1.7431 AU
2.3851 AU
Eccentricity0.2692
3.68 yr (1,345 d)
248.82°
0° 16m 3.36s / day
Inclination7.3102°
274.08°
54.118°
Physical characteristics
Mean diameter
3.51±0.80 km[4]
4.263±0.620 km[5][6]
4.71 km (calculated)[7]
Synodic rotation period
5.792±0.001 h[8]
5.7937±0.0001 h[9]
0.20 (assumed)[7]
0.29±0.14[4]
0.294±0.100[5][6]
S (assumed)[7]
LS (SDSS-MOC)[10]
Absolute magnitude (H)
13.8[6]
14.0[2][7]
14.33[4]

5635 Cole (prov. designation: 1981 ER5) is a background asteroid from the inner regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia.[1] The L/S-type asteroid has a rotation period of 5.79 hours.[7] It was named after the fictional character Joshua Cole.[1]

Orbit and classification[]

Cole is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[3] It orbits the Sun in the inner main-belt at a distance of 1.7–3.0 AU once every 3 years and 8 months (1,345 days; semi-major axis of 2.39 AU). Its orbit has an eccentricity of 0.27 and an inclination of 7° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at the discovering Siding Spring Observatory on 9 February 1981, or four weeks prior to its official discovery observation.[1]

Naming[]

This minor planet was named after fictional character Joshua Cole in the novel Cole of Spyglass Mountain (1923) by . The protagonist, reminiscent of Oliver Twist, is an amateur astronomer in a dystopian society where boys receive numbers instead of names. In the novel, Cole's number is List of minor planets: 5001–6000#635 and corresponds to this asteroid's numbering.[1] The official naming citation was prepared by David H. Levy and published by the Minor Planet Center on 14 December 1997 (M.P.C. 31024).[11]

Physical characteristics[]

In the Moving Object Catalog of the Sloan Digital Sky Survey, Cole has a spectral type is closest to an L-type asteroid followed by the common, stony S-type.[10] The Collaborative Asteroid Lightcurve Link also assume it to be an S-type asteroid.[7]

Rotation period[]

In September 2004, two rotational lightcurves of Cole were obtained from photometric observations by Donald Pray, Silvano Casulli, René Roy. Lightcurve analysis gave a well-defined rotation period of 5.792 and 5.7937 hours with a brightness amplitude of 0.33 and 0.30 magnitude, respectively (U=3/3).[8][9]

Diameter and albedo[]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Cole measures between 3.51 and 4.263 kilometers in diameter and its surface has an albedo between 0.29 and 0.294,[4][5][6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroids of 0.20, and calculates a diameter of 4.71 kilometers based on an absolute magnitude of 14.0.[7]

References[]

  1. ^ a b c d e f g "5635 Cole (1981 ER5)". Minor Planet Center. Retrieved 16 May 2018.
  2. ^ a b c d "JPL Small-Body Database Browser: 5635 Cole (1981 ER5)" (2018-04-24 last obs.). Jet Propulsion Laboratory. Retrieved 16 May 2018.
  3. ^ a b "Asteroid 5635 Cole". Small Bodies Data Ferret. Retrieved 15 May 2018.
  4. ^ 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.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68.
  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". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. (catalog)
  7. ^ a b c d e f g "LCDB Data for (5635) Cole". Asteroid Lightcurve Database (LCDB). Retrieved 16 May 2018.
  8. ^ a b Pray, Donald P. (September 2005). "Lightcurve analysis of asteroids 106, 752, 847, 1057, 1630, 1670, 1927 1936, 2426, 2612, 2647, 4087, 5635, 5692, and 6235" (PDF). Minor Planet Bulletin. 32 (3): 48–51. Bibcode:2005MPBu...32...48P. ISSN 1052-8091. Retrieved 22 March 2020.
  9. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (5635) Cole". Geneva Observatory. Retrieved 16 May 2018.
  10. ^ a b Carvano, J. M.; Hasselmann, P. H.; Lazzaro, D.; Mothé-Diniz, T. (February 2010). "SDSS-based taxonomic classification and orbital distribution of main belt asteroids". Astronomy and Astrophysics. 510: 12. Bibcode:2010A&A...510A..43C. doi:10.1051/0004-6361/200913322. Retrieved 30 October 2019. (PDS data set)
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 16 May 2018.

External links[]

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