1848 Delvaux

1848 Delvaux (prov. designation: 1933 QD) is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 18 August 1933, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle, Belgium.[12] It was later named after astronomer Georges Roland's sister-in-law.[2]

1848 Delvaux
Shape model of Delvaux from its lightcurve
Discovery [1]
Discovered byE. Delporte
Discovery siteUccle Obs.
Discovery date18 August 1933
Designations
(1848) Delvaux
Named after
(sister-in-law of)
Georges Roland [2]
1933 QD · 1936 DH
1948 SF · 1948 SK
1951 GV · 1952 ML
1953 TU1 · 1953 VE1
1956 GL · 1972 QN
1975 FV · A912 FA
main-belt · Koronis [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc83.47 yr (30,486 days)
Aphelion3.0019 AU
Perihelion2.7407 AU
2.8713 AU
Eccentricity0.0455
4.87 yr (1,777 days)
138.35°
0° 12m 9.36s / day
Inclination1.4404°
331.66°
316.61°
Physical characteristics
Dimensions16.66±1.95 km[4]
17.030±0.114[5]
17.12 km (calculated)[3]
17.446±0.143 km[6]
17.51±0.63 km[7]
3.637 h (adopted)[3]
3.638±0.001 h[8]
3.639±0.001 h[9]
3.639±0.001 h[10]
3.65±0.01 h[8]
0.2329±0.0432[6]
0.24 (assumed)[3]
0.242±0.036[5]
0.255±0.020[7]
0.461±0.316[4]
SMASS = S [1] · S [3]
10.35[4] · 10.90[7] · 11.0[1][3][6] · 11.24±0.10[10] · 11.26±0.40[11]

    Orbit and classification

    Delvaux is a stony asteroid and a member of the Koronis family, a collisional group consisting of a few hundred known bodies with nearly ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,777 days). Its orbit has an eccentricity of 0.05 and an inclination of 1° with respect to the ecliptic.[1] First identified as A912 FA at Simeiz Observatory in 1912, the body's observation arc begins 3 day after its official discovery, as non of the previous observations were used.[12]

    Physical characteristics

    In the SMASS taxonomy Delvaux is a common S-type asteroid.[2]

    Rotation period

    It has a well-determined rotation period of 3.63 to 3.65 hours with a brightness variation of 0.57–0.69 magnitude (U=3/3/3/3).[8][9][10] The Collaborative Asteroid Lightcurve Link (CALL) adopts a period of 3.637 hours.[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, Delvaux measures between 16.66 and 17.51 kilometers in diameter, and its surface has an albedo of 0.233 to 0.461.[4][5][6][7] CALL assumes a standard albedo for members of the Koronis family of 0.24, and calculates a diameter of 17.12 kilometers with an absolute magnitude of 11.0.[3]

    Name

    This minor planet was named after the sister-in-law of Georges Roland, astronomer at the observatory in Uccle and known as the co-discoverer of the comet Arend–Roland.[2] The approved naming citation was published by the Minor Planet Center on 8 April 1982 (M.P.C. 6832).[13]

    References
    1. "JPL Small-Body Database Browser: 1848 Delvaux (1933 QD)" (2017-02-04 last obs.). Jet Propulsion Laboratory. Retrieved 1 July 2017.
    2. Schmadel, Lutz D. (2007). "(1848) Delvaux". Dictionary of Minor Planet Names – (1848) Delvaux. Springer Berlin Heidelberg. p. 148. doi:10.1007/978-3-540-29925-7_1849. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1848) Delvaux". Asteroid Lightcurve Database (LCDB). Retrieved 14 December 2016.
    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:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 14 December 2016.
    5. 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 14 December 2016.
    6. 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.
    7. 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)
    8. Behrend, Raoul. "Asteroids and comets rotation curves – (1848) Delvaux". Geneva Observatory. Retrieved 14 December 2016.
    9. Arredondo, Anicia; Hartt, Anne-Marie; Yazdi, Sormeh K. (October 2014). "Rotation Periods and R Magnitudes of Three Koronis Family Members". The Minor Planet Bulletin. 41 (4): 252–254. Bibcode:2014MPBu...41..252A. ISSN 1052-8091. Retrieved 14 December 2016.
    10. Slivan, Stephen M.; Binzel, Richard P.; Boroumand, Shaida C.; Pan, Margaret W.; Simpson, Christine M.; Tanabe, James T.; et al. (May 2008). "Rotation rates in the Koronis family, complete to H≈11.2". Icarus. 195 (1): 226–276. Bibcode:2008Icar..195..226S. doi:10.1016/j.icarus.2007.11.019. Retrieved 14 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 14 December 2016.
    12. "1848 Delvaux (1933 QD)". Minor Planet Center. Retrieved 14 December 2016.
    13. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 14 December 2016.

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