1329 Eliane

1329 Eliane, provisional designation 1933 FL, is a stony asteroid and a potentially slow rotator from the central region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 23 March 1933, by Belgian astronomer Eugène Delporte at the Uccle Observatory in Belgium.[12] The asteroid was named after the daughter of astronomer Paul Bourgeois.

1329 Eliane
Discovery[1]
Discovered byE. Delporte
Discovery siteUccle Obs.
Discovery date23 March 1933
Designations
(1329) Eliane
Named after
Éliane Bourgeois[2]
(Paul Bourgeois' daughter)
1933 FL · 1955 MP
1975 FT
main-belt · (middle)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc84.02 yr (30,687 days)
Aphelion3.0704 AU
Perihelion2.1626 AU
2.6165 AU
Eccentricity0.1735
4.23 yr (1,546 days)
238.05°
0° 13m 58.44s / day
Inclination14.469°
132.07°
164.92°
Physical characteristics
Dimensions19.467±0.270 km[4][5]
19.63 km (calculated)[3]
20.94±0.25 km[6]
22.64±0.47 km[7]
8.0±0.1 h (wrong)[8]
72±2 h[9]
106±25 h[10][lower-alpha 1]
0.1486±0.0119[4]
0.149±0.012[5]
0.150±0.019[7]
0.180±0.005[6]
0.20 (assumed)[3]
S (Tholen)[1]
S (SMASS)[1] · S[3][11]
B–V = 0.873[1]
U–B = 0.443[1]
10.90[1][3][4][6][7] · 10.71±0.80[11]

    Orbit and classification

    The S-type asteroid orbits the Sun in the central main-belt at a distance of 2.2–3.1 AU once every 4 years and 3 months (1,546 days). Its orbit has an eccentricity of 0.17 and an inclination of 14° with respect to the ecliptic.[1]

    Rotation period

    A rotational lightcurve of Eliane revealed a potentially very long rotation period of 106±25 hours with a brightness amplitude of 0.30 in magnitude (U=2-).[10][lower-alpha 1] American astronomer Brian Warner at the Palmer Divide Observatory (716), Colorado, originally took the photometric observations in April 2001. The body's long period was only discovered after the data had been reevaluated in 2010.[lower-alpha 2] As of 2017, the potentially slow rotator has not been further examined.[3]

    Diameter and albedo

    According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 19.5 and 22.6 kilometers in diameter and its surface has an albedo in the range of 0.15 to 0.18.[6][4][7] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20, and calculates a diameter of 19.6 kilometers using an absolute magnitude of 10.90.[3]

    Naming

    This minor planet was named after Éliane Bourgeois, daughter of astronomer Paul Bourgeois, who was a professor at the discovering Royal Observatory in Uccle, Belgium, and after whom the asteroid 1543 Bourgeois is named.[2] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 121).[2] Bourgeois himself is credited with the discovery of 1547 Nele.[13]

    Notes
    1. Lightcurve plot of 1329 Eliane, Palmer Divide Observatory, B. D. Warner (2001)
    2. Note to Warner's Revised rotation period: "Updated results are given for six asteroids previously reported from the Palmer Divide Observatory. The original images were remeasured to obtain new data sets using the latest version of MPO Canopus photometry software, analysis tools, and revised techniques for linking multiple observing runs covering several days to several weeks. Results that were previously not reported or had significantly different periods and/or amplitudes were found for 1329 Eliane, 1582 Martir, 2023 Asaph, 8041 Masumoto, (26853) 1992 UQ2, and (52387) 1993 OM7. This is the second in a series of papers that examines results obtained during the initial years of the asteroid lightcurve program at PDO." Upon Further Review: II. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory

    References
    1. "JPL Small-Body Database Browser: 1329 Eliane (1933 FL)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 25 July 2017.
    2. Schmadel, Lutz D. (2007). "(1329) Eliane". Dictionary of Minor Planet Names – (1329) Eliane. Springer Berlin Heidelberg. p. 108. doi:10.1007/978-3-540-29925-7_1330. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1329) Eliane". Asteroid Lightcurve Database (LCDB). Retrieved 2 May 2016.
    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 2 May 2016.
    5. 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 1 December 2016.{{cite journal}}: CS1 maint: multiple names: authors list (link)
    6. 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. (online, AcuA catalog p. 153)
    7. 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 2 May 2016.
    8. Warner, B. D. (March 2002). "Asteroid Photometry at the Palmer Divide Observatory: Results for 573 Recha, 1329 Eliane, and 8041 Masumoto". The Minor Planet Bulletin. 29: 14–15. Bibcode:2002MPBu...29...14W. Retrieved 2 May 2016.
    9. Behrend, Raoul. "Asteroids and comets rotation curves – (1329) Eliane". Geneva Observatory. Retrieved 2 May 2016.
    10. Warner, Brian D. (October 2010). "Upon Further Review: II. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin. 37 (4): 150–151. Bibcode:2010MPBu...37..150W. ISSN 1052-8091. Retrieved 2 May 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 2 May 2016.
    12. "1329 Eliane (1933 FL)". Minor Planet Center. Retrieved 2 May 2016.
    13. "1547 Nele (1929 CZ)". Minor Planet Center. Retrieved 21 March 2017.

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