1339 Désagneauxa

1339 Désagneauxa, provisional designation 1934 XB, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 4 December 1934, by French astronomer Louis Boyer at the North African Algiers Observatory in Algeria.[13] A few nights later, the asteroid was independently discovered by astronomers Grigory Neujmin and Eugène Delporte, at the Crimean Simeiz and Belgian Uccle Observatory, respectively.[2] It was later named after discoverer's brother-in-law.[2]

1339 Désagneauxa
Modelled shape of Désagneauxa
Discovery [1]
Discovered byL. Boyer
Discovery siteAlgiers Obs.
Discovery date4 December 1934
Designations
(1339) Désagneauxa
Named after
discoverer's brother-in-law[2]
1934 XB · 1951 AF
main-belt · Eos [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc82.57 yr (30,160 days)
Aphelion3.1936 AU
Perihelion2.8467 AU
3.0202 AU
Eccentricity0.0574
5.25 yr (1,917 days)
260.48°
0° 11m 16.08s / day
Inclination8.6903°
291.00°
162.21°
Physical characteristics
Dimensions22.96±1.7 km[4]
23.04 km (derived)[3]
24.20±0.65 km[5]
24.450±0.209 km[6]
25.733±0.200 km[7]
9.3209±0.0006 h[8]
9.37510±0.00005 h[9]
9.37514±0.00001 h[10]
9.380±0.003 h[11]
0.1274±0.0165[7]
0.144±0.024[6]
0.151±0.009[5]
0.1589±0.026[4]
0.1747 (derived)[3]
Tholen = S [1] · S [3]
B–V = 0.790[1]
U–B = 0.425[1]
10.30±0.23[12] · 10.7[1][3] · 10.81[4][5][7]

    Orbit and classification

    Désagneauxa is a member of the Eos family, which is thought to have formed from a catastrophic collision, disrupting its parent body into thousands of fragments. It is the 4th largest asteroid family with nearly 10,000 known members. The asteroid orbits the Sun in the outer main-belt at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,917 days). Its orbit has an eccentricity of 0.06 and an inclination of 9° with respect to the ecliptic.[1] As no precovery were taken, and no prior identifications were made, the body's observation arc begins with its official discovery at Algiers in 1934.[13]

    Naming

    This minor planet was named by the discoverer in honour of his brother-in-law.[2] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 122).[2]

    Physical characteristics

    In the Tholen taxonomy, Désagneauxa is a stony S-type asteroid.[1]

    Rotation period

    In August 2008, a rotational lightcurve of this asteroid was obtained by French amateur astronomer René Roy. Lightcurve analysis gave it a rotation period of 9.3209 hours with a change in brightness of 0.48 magnitude (U=2+).[8] In November 2007, photometric observations at the U.S. Ricky Observatory (H46), Missouri, gave a refined period of 9.380 hours with an amplitude of 0.45 magnitude (U=3).[11]

    Spin axis

    In addition modeled lightcurves, using photometric data from the Lowell photometric database and other sources, gave a period of 9.37510 and 9.37514 hours, as well as a spin axis of (n.a., 65.0°) and (63.0°, 53.0°) in ecliptic coordinates, respectively (U=n.a.).[9][10]

    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, Désagneauxa measures between 22.96 and 25.73 kilometers in diameter, and its surface has an albedo between 0.127 and 0.159.[4][5][6][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1747 and a diameter of 23.04 kilometers with an absolute magnitude of 10.7.[3]

    References
    1. "JPL Small-Body Database Browser: 1339 Desagneauxa (1934 XB)" (2017-07-01 last obs.). Jet Propulsion Laboratory. Retrieved 25 July 2017.
    2. Schmadel, Lutz D. (2007). "(1339) Désagneauxa". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 109. doi:10.1007/978-3-540-29925-7_1340. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1339) Désagneauxa". Asteroid Lightcurve Database (LCDB). Retrieved 13 January 2017.
    4. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    5. 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)
    6. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 13 January 2017.
    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. Behrend, Raoul. "Asteroids and comets rotation curves – (1339) Désagneauxa". Geneva Observatory. Retrieved 13 January 2017.
    9. Hanus, J.; Broz, M.; Durech, J.; Warner, B. D.; Brinsfield, J.; Durkee, R.; et al. (November 2013). "An anisotropic distribution of spin vectors in asteroid families". Astronomy and Astrophysics. 559: 19. arXiv:1309.4296. Bibcode:2013A&A...559A.134H. doi:10.1051/0004-6361/201321993. Retrieved 13 January 2017.
    10. Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. Retrieved 13 January 2017.
    11. Bennefeld, Craig; Cantu, Jenel; Holly, Vashti; Jordon, Latoya; Martin, Tierra; Soar, Elysabeth; et al. (April 2009). "Asteroid Lightcurve Analysis at Ricky Observatory". The Minor Planet Bulletin. 36 (2): 45–48. Bibcode:2009MPBu...36...45B. ISSN 1052-8091. Retrieved 13 January 2017.
    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 13 January 2017.
    13. "1339 Desagneauxa (1934 XB)". Minor Planet Center. Retrieved 13 January 2017.
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