1027 Aesculapia

1027 Aesculapia
Discovery [1]
Discovered by G. van Biesbroeck
Discovery site Yerkes Observatory
Discovery date 11 November 1923
Designations
MPC designation 1027 Aesculapia
Named after
 Aesculapius
(Greek/Roman deity)[2]
A923 YO11 · 1942 DH
1977 LP1 · A899 PE
A908 AE
main-belt · Themis [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 108.19 yr (39518 days)
Aphelion 3.5625 AU (532.94 Gm)
Perihelion 2.7403 AU (409.94 Gm)
3.1514 AU (471.44 Gm)
Eccentricity 0.13046
5.59 yr (2043.4 d)
86.494°
0° 10m 34.248s / day
Inclination 1.2537°
29.347°
132.10°
Earth MOID 1.74786 AU (261.476 Gm)
Jupiter MOID 1.42051 AU (212.505 Gm)
Jupiter Tisserand parameter 3.194
Physical characteristics
Dimensions 32.20 km[4]
38.55±0.82 km[5]
34.464±0.335 km[6]
32.10 km (derived)[3]
Mean radius
 16.10±0.7 km
9.791 h (0.4080 d)[1][7]
6.83±0.10 h[8]
10 h[9]
19.5061±0.1501 h[10]
0.0981[4]
0.071±0.003[5]
0.0856±0.0056[6]
0.0821 (derived)[3]
0.0981±0.009[1]
S [3]
10.8[1]

    1027 Aesculapia, provisional designation A923 YO11, is a stony asteroid from the outer region of the asteroid belt, about 32 kilometers in diameter. It was discovered by Belgian–American astronomer George Van Biesbroeck at the U.S Yerkes Observatory in Williams Bay, Wisconsin, on 11 November 1923.[11]

    The S-type asteroid orbits the Sun at a distance of 2.7–3.6 AU once every 5 years and 7 months (2,045 days). Its orbit shows an eccentricity of 0.13 and is tilted by 1 degree to the plane of the ecliptic. It is a member of the Themis family, a dynamical family of outer-belt asteroids which are known for their nearly coplanar ecliptical orbits. Several observations of the asteroid's rotation period rendered divergent results in the range of 7 to 20 hours,[8][9] with the two most recent 2015-publications giving a period of 9.8 and 19.5 hours, respectively.[7][10] According to the surveys carried out by IRAS, Akari, and WISE/NEOWISE, the body has a albedo between 0.07 and 0.10.[4][5][6]

    The minor planet was named for Aesculapius, the Greek and Roman demigod of medicine and healing, son of Apollo and Koronis, after whom the asteroids 158 Koronis and 1862 Apollo and are named, respectively.[2]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1027 Aesculapia (A923 YO11)" (2015-06-18 last obs.). Jet Propulsion Laboratory. Retrieved 2 May 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1027) Aesculapia. Springer Berlin Heidelberg. p. 88. ISBN 978-3-540-29925-7. Retrieved December 2015.
    3. 1 2 3 4 "LCDB Data for (1027) Aesculapia". Asteroid Lightcurve Database (LCDB). Retrieved December 2015.
    4. 1 2 3 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 December 2015.
    5. 1 2 3 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 December 2015.
    6. 1 2 3 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 December 2015.
    7. 1 2 Ehlert, Steven; Kingery, Aaron (July 2015). "New Lightcurves of 1027 Aesculapia and 3395 Jitka". The Minor Planet Bulletin 42 (3): 211. Bibcode:2015MPBu...42..211E. ISSN 1052-8091. Retrieved December 2015.
    8. 1 2 Maleszewski, Chester; Clark, Maurice (December 2004). "Bucknell University Observatory lightcurve results for 2003-2004". The Minor Planet Bulletin 31 (4): 93–94. Bibcode:2004MPBu...31...93M. ISSN 1052-8091. Retrieved December 2015.
    9. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1027) Aesculapia". Geneva Observatory. Retrieved December 2015.
    10. 1 2 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 December 2015.
    11. ↑ "1027 Aesculapia (A923 YO11)". Minor Planet Center. Retrieved December 2015.

    External links


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