1622 Chacornac

1622 Chacornac
Discovery [1]
Discovered by A. Schmitt
Discovery site Uccle – Belgium
Discovery date 15 March 1952
Designations
MPC designation 1622 Chacornac
Named after
 Jean Chacornac
(astronomer)[2]
1952 EA · 1932 DD
1933 UX · 1939 KE
1942 EB1 · 1949 KF
1952 DP2 · 1953 TM1
main-belt · Flora [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 85.51 yr (31,231 days)
Aphelion 2.5983 AU
Perihelion 1.8706 AU
2.2344 AU
Eccentricity 0.1628
3.34 yr (1,220 days)
28.440°
0° 17m 42.36s / day
Inclination 6.4612°
4.3661°
256.49°
Physical characteristics
Dimensions 8.43±0.32 km[4]
9.85 km (calculated)[3]
10.27±0.65 km[5]
11.485±0.006 h[6]
12.206±0.002 h[7]
12.2190±0.0116 h[8]
12.2044±0.0041 h[8]
0.224±0.030[5]
0.24 (assumed)[3]
0.360±0.042[4]
S [3][9]
11.954±0.001 (R)[8]
12.040±0.001 (R)[8]
12.04±1.25[9]
12.10[4]
12.2[1][3][5]

    1622 Chacornac, provisional designation 1952 EA, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered by French astronomer Alfred Schmitt at the Royal Observatory of Belgium in Uccle on 15 March 1952.[10]

    The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,220 days). Its orbit has an eccentricity of 0.16 and an inclination of 6° with respect to the ecliptic.[1] The first precovery was taken at Lowell Observatory in 1930, extending the asteroid's observation arc by 22 years prior to its discovery.[10]

    Between 2009 and 2013, several rotational light-curves for this asteroid were obtained from photometric observations at the Palomar Transient Factory and the Hunters Hill Observatory, as well as by astronomers Eric Barbotin and Raoul Behrend. The light-curves gave a rotation period between 11.48 and 12.20 hours with a brightness variation between 0.21 and 0.25 in magnitude (U=2/2/2/2).[6][7][8]

    According to the survey carried out by the Japanese Akari satellite, the asteroid measures 10.3 kilometers in diameter and its surface has an albedo of 0.224,[5] while observations by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission gave a diameter of 8.4 kilometers and a high albedo of 0.36.[4] The Collaborative Asteroid Lightcurve Link agrees with the results obtained by AKARI and assumes an albedo of 0.24 – derived from 8 Flora, the family's largest member and namesake – and calculates a diameter of 9.9 kilometers, based on an absolute magnitude of 12.2.[3]

    The minor planet was named in memory of French astronomer Jean Chacornac (1823–1873), an early discoverer of minor planets himself, most notably 25 Phocaea. He also discovered the parabolic comet C/1852 K1 (Chacornac) in 1852 and independently discovered 20 Massalia. The lunar crater Chacornac also bears his name.[2] Naming citation was published before November 1977 (M.P.C. 4418).[11]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1622 Chacornac (1952 EA)" (2016-06-15 last obs.). Jet Propulsion Laboratory. Retrieved 1 August 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1622) Chacornac. Springer Berlin Heidelberg. p. 129. ISBN 978-3-540-00238-3. Retrieved 1 August 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (1622) Chacornac". Asteroid Lightcurve Database (LCDB). Retrieved 1 August 2016.
    4. 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 1 August 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 1 August 2016.
    6. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1622) Chacornac". Geneva Observatory. Retrieved 1 August 2016.
    7. 1 2 Higgins, David; Warner, Brian D. (October 2009). "Lightcurve Analysis at Hunters Hill Observatory and Collaborating Stations - Autumn 2009". The Minor Planet Bulletin. 36 (4): 159–160. Bibcode:2009MPBu...36..159H. ISSN 1052-8091. Retrieved 1 August 2016.
    8. 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. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 1 August 2016.
    9. 1 2 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 1 August 2016.
    10. 1 2 "1622 Chacornac (1952 EA)". Minor Planet Center. Retrieved 1 August 2016.
    11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 1 August 2016.

    External links

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