1732 Heike

1732 Heike, provisional designation 1943 EY, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter.

1732 Heike
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date9 March 1943
Designations
(1732) Heike
Named after
Heike Neckel (granddaughter of astronomer Alfred Bohrmann) [2]
1943 EY · 1934 LC
1935 TD · 1938 FC
1938 GB · 1950 NR1
1951 WW · 1960 ME
1961 TU1 · 1966 QJ
1971 QY1 · A906 FA
A924 PB
main-belt · Eos [3][4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc111.22 yr (40,623 days)
Aphelion3.3482 AU
Perihelion2.6793 AU
3.0137 AU
Eccentricity0.1110
5.23 yr (1,911 days)
249.18°
0° 11m 18.24s / day
Inclination10.776°
155.63°
211.36°
Physical characteristics
Dimensions20.50±0.79 km[5]
22.378±0.235[6]
23.485±0.161 km[7]
24.06±4.2 km[8]
24.17 km (derived)[3]
24.31±1.45 km[9]
3.90 h[4]
4.742±0.013 h[10]
0.1108±0.052[8]
0.114±0.015[9]
0.1169±0.0116[7]
0.128±0.025[6]
0.1320 (derived)[3]
0.201±0.040[5]
LS [11] · S [3]
10.80[5] · 10.82±0.19[11] · 10.9[1][3] · 11.1[8][9][7]

    It was discovered on 9 March 1943, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after Heike Neckel, the granddaughter of astronomer Alfred Bohrmann.[2][12]

    Classification and orbit

    The S-type asteroid is a member of the Eos family. It orbits the Sun in the outer main-belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,911 days). Its orbit has an eccentricity of 0.11 and an inclination of 11° with respect to the ecliptic.[1] Heike was first identified as A906 FA at Heidelberg Observatory in 1906. The body's first used observation was also taken at Heidelberg in 1924, when it was identified as 1924 PB, extending the body's observation arc by 19 years prior to its official discovery observation.[12]

    Rotation period

    In October 2010, a rotational lightcurve of Heike was obtained from photometric observations at the Truman Observatory. It gave a well-defined rotation period of 4.742 hours with a brightness variation of 0.32 magnitude (U=3),[10][13] superseding a previous period of 3.90 hours (U=2).[4]

    Diameter and albedo

    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 measures between 20.50 and 24.31 kilometers in diameter, and its surface has an albedo between 0.110 and 0.201.[5][7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.132 and a diameter of 24.17 kilometers with an absolute magnitude of 10.9.[3]

    Naming

    This minor planet was named after Heike Neckel, granddaughter of German astronomer Alfred Bohrmann (1904–2000), who was a colleague of the discoverer at Heidelberg. The asteroid 1635 Bohrmann bears his name.[2] The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3933).[14]

    References
    1. "JPL Small-Body Database Browser: 1732 Heike (1943 EY)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 1 July 2017.
    2. Schmadel, Lutz D. (2007). "(1732) Heike". Dictionary of Minor Planet Names – (1732) Heike. Springer Berlin Heidelberg. p. 138. doi:10.1007/978-3-540-29925-7_1733. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1732) Heike". Asteroid Lightcurve Database (LCDB). Retrieved 21 December 2016.
    4. Alvarez-Candal, Alvaro; Duffard, René; Angeli, Cláudia A.; Lazzaro, Daniela; Fernández, Silvia (December 2004). "Rotational lightcurves of asteroids belonging to families". Icarus. 172 (2): 388–401. Bibcode:2004Icar..172..388A. doi:10.1016/j.icarus.2004.06.008. Retrieved 21 December 2016.
    5. 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 December 2016.
    6. 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. Retrieved 21 December 2016.
    7. 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.
    8. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 17 October 2019.
    9. 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 17 October 2019. (online, AcuA catalog p. 153)
    10. King, J. Ryan; Beaky, Matthew M. (January 2010). "A Revised Period for Asteroid 1732 Heike". The Minor Planet Bulletin. 37 (1): 34. Bibcode:2010MPBu...37...34K. ISSN 1052-8091. Retrieved 21 December 2016.
    11. 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 21 December 2016.
    12. "1732 Heike (1943 EY)". Minor Planet Center. Retrieved 21 December 2016.
    13. Carbo, Landy; Kragh, Katherine; Krotz, Jonathan; Meiers, Andrew; Shaffer, Nelson; Torno, Steven; et al. (July 2009). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory and Oakley Observatory: 2008 September and October". The Minor Planet Bulletin. 36 (3): 91–94. Bibcode:2009MPBu...36...91C. ISSN 1052-8091. Retrieved 21 December 2016.
    14. Schmadel, Lutz D. "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

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