504 Cora

504 Cora
Discovery [1]
Discovered by S. I. Bailey
Discovery site Boyden Station Arequipa
Discovery date 30 June 1902
Designations
MPC designation 504 Cora
Named after
 Cora (Inca mythology)[2]
1902 LK · 1947 OH
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 109.71 yr (40,071 days)    
Aphelion 3.3130 AU
Perihelion 2.1281 AU
2.7206 AU
Eccentricity 0.2177
4.49 yr (1,639 days)
59.154°
Inclination 12.890°
104.64°
247.88°
Physical characteristics
Dimensions 30.02±2.3 km (IRAS:40)[4]
30.39±0.35 km[5]
34.994±0.490 km[6]
27.19±1.00 km[7]
29.06 km (derived)[3]
7.588±0.003 h[8]
24.06 h[9]
7.591±0.001 h[10]
7.5882±0.0043 h[11]
7.5915±0.0043[11]
0.3407±0.058 (IRAS:40)[4]
0.336±0.010[5]
0.2509±0.0553[6]
0.239±0.032[7]
0.1908 (derived)[3]
SMASS = X [1]
X [3]
10.1[1][3]
9.4[4][5][6]
10.00[7]
9.776±0.001[11]
9.858±0.001[11]
10.07±0.35[12]

    504 Cora, provisional designation 1902 LK, is an asteroid from the outer region of the asteroid belt, about 30 kilometers in diameter. It was discovered by American astronomer Solon Bailey at Harvard's Boyden Station in Arequipa, Peru, on 30 June 1902.[13]

    The asteroid orbits the Sun at a distance of 2.1–3.3 AU once every 4 years and 6 months (1,639 days). Its orbit has a relatively high eccentricity of 0.22 and an inclination of 13° with respect to the ecliptic.[1]

    Mineralogic observations in the near-infrared with the NASA IRTF telescope using its SpeX spectrograph, showed that the surface of the X-type asteroid has absorption features which indicate the presence of pyroxene minerals.[14] In 2004, the body's spectrum was also obtained in the SMASSII survey at the U.S. MDM Observatory, Kitt Peak, Arizona.[15] Several photometric light-curve analysis have been performed to measure the asteroid's rotation period of 7.59 hours.[10][11] The most reliable observation was achieved in 2010, at the Hunters Hill Observatory (E14) in Ngunnawal, Australia, which gave a period of 7.588±0.003 hours with a brightness amplitude of 0.20 in magnitude (U=3-).[8]

    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, the asteroid's surface has a high albedo between 0.239 and 0.341. Combined with their respective absolute magnitudes, this results in a diameter estimate of 27.2 to 35.0 kilometers.[4][5][6][7] In contrast with the space-based observations, the Collaborative Asteroid Lightcurve Link (CALL) derives a much lower albedo of 0.19 with a corresponding diameter of 29.1 kilometers.[3]

    The minor planet was named after Cora, a figure in Inca mythology.[2][16]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 504 Cora (1902 LK)" (2016-02-14 last obs.). Jet Propulsion Laboratory. Retrieved March 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (504) Cora. Springer Berlin Heidelberg. p. 55. ISBN 978-3-540-00238-3. Retrieved March 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (504) Cora". Asteroid Lightcurve Database (LCDB). Retrieved March 2016.
    4. 1 2 3 4 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 March 2016.
    5. 1 2 3 4 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 March 2016.
    6. 1 2 3 4 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. Retrieved March 2016.
    7. 1 2 3 4 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 March 2016.
    8. 1 2 Higgins, David (January 2011). "Period Determination of Asteroid Targets Observed at Hunters Hill Observatory: May 2009 - September 2010". The Minor Planet Bulletin 38 (1): 41–46. Bibcode:2011MPBu...38...41H. ISSN 1052-8091. Retrieved March 2016.
    9. ↑ Barucci, M. A.; di Martino, M.; Fulchignoni, M. (May 1992). "Rotational properties of small asteroids - Photoelectric observations". Astronomical Journal: 1679–1686. Bibcode:1992AJ....103.1679B. doi:10.1086/116185. ISSN 0004-6256. Retrieved March 2016.
    10. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (504) Cora". Geneva Observatory. Retrieved March 2016.
    11. 1 2 3 4 5 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:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved March 2016.
    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 March 2016.
    13. ↑ "504 Cora (1902 LK)". Minor Planet Center. Retrieved March 2016.
    14. ↑ Reynolds, Chalbeth; Hardersen, P. S.; Gaffey, M. J. (October 2007). "The Near-IR Spectrocopy of Two M-Class Main Belt Asteroids, 418 Alemannia and 504 Cora". American Astronomical Society 39: 477. Bibcode:2007DPS....39.3306R. Retrieved March 2016.
    15. ↑ Bus, S.; Binzel, R. P. (October 2004). "504 Cora CCD Spectrum". NASA Planetary Data System. Bibcode:2004PDSS....1..991B. Retrieved March 2016.
    16. ↑ Osten, H. (October 1903). "Aufsuchungsephemeride des Planeten (504) [1902 LK]". Astronomische Nachrichten: 315. Bibcode:1903AN....163..315O. doi:10.1002/asna.19031632009. Retrieved March 2016.

    External links


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