2384 Schulhof

2384 Schulhof (prov. designation: 1943 EC1) is a mid-sized asteroid and the namesake of the Schulhof family, located in the Eunomian region of the intermediate asteroid belt. It was discovered on 2 March 1943, by French astronomer Marguerite Laugier at Nice Observatory in southeastern France.[1] The asteroid was later named after Hungarian astronomer Lipót Schulhof.[2] The presumed S-type asteroid has a short rotation period of 3.3 hours and measures approximately 12 kilometers (7.5 miles) in diameter.

2384 Schulhof
Shape model of Schulhof from its lightcurve
Discovery [1]
Discovered byM. Laugier
Discovery siteNice Obs.
Discovery date2 March 1943
Designations
(2384) Schulhof
Named after
Lipót Schulhof [2]
(Hungarian astronomer)
1943 EC1 · 1943 GV
1960 FE · 1962 WL1
1970 RP · 1981 FF
A909 BF
main-belt [1][3] · (middle)
Schulhof [4]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc108.97 yr (39,803 d)
Aphelion2.9231 AU
Perihelion2.2989 AU
2.6110 AU
Eccentricity0.1195
4.22 yr (1,541 d)
256.37°
0° 14m 0.96s / day
Inclination13.530°
7.9084°
205.72°
Physical characteristics
Mean diameter
11.485±0.174 km[5]
11.721±0.138 km[6]
12.66 km (calculated)[7]
3.294±0.006 h[8]
0.21 (assumed)[7]
0.2733±0.0217[6]
0.280±0.045[5]
S (assumed) [7]
11.7[6]
11.8[3][7]

    Orbit and classification

    Schulhof is the principal body and namesake of the Schulhof family, a small asteroid family within the region of the Eunomia family of the main-belt.[4][9] It orbits the Sun in the central asteroid belt at a distance of 2.3–2.9 AU once every 4 years and 3 months (1,541 days). Its orbit has an eccentricity of 0.12 and an inclination of 14° with respect to the ecliptic.[3] It was first observed as A909 BF at Heidelberg Observatory in 1909. The body's observation arc begins with its official discovery observation at Nice in 1943.[1]

    Naming

    This minor planet was named in memory of Austrian–Hungarian astronomer Lipót Schulhof (1847–1921), observer of asteroids and comets, discoverer of the main-belt asteroid 147 Protogeneia, and awardee of the Lalande Prize.[2] The official naming citation was published by the Minor Planet Center on 17 February 1984, based on a suggestion by Brian G. Marsden (M.P.C. 8541).[10]

    Physical characteristics

    Schulhof is an assumed S-type asteroid.[7]

    Rotation period
    Lightcurve-based 3D-model of Schulhof

    In April 2002, a rotational lightcurve of Schulhof was obtained from photometric observations at the U.S. Oakley Observatory. It gave a well-defined rotation period of 3.294±0.006 hours with a brightness variation of 0.43 magnitude (U=3).[8]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Schulhof measures 11.5 and 11.7 kilometers in diameter and its surface has an albedo of 0.27 and 0.28, respectively.[5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived form 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 12.7 kilometers with an absolute magnitude of 11.8.[7]

    References
    1. "2384 Schulhof (1943 EC1)". Minor Planet Center. Retrieved 9 August 2018.
    2. Schmadel, Lutz D. (2007). "(2384) Schulhof". Dictionary of Minor Planet Names – (2384) Schulhof. Springer Berlin Heidelberg. p. 194. doi:10.1007/978-3-540-29925-7_2385. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 2384 Schulhof (1943 EC1)" (2018-01-20 last obs.). Jet Propulsion Laboratory. Retrieved 9 August 2018.
    4. "Asteroid 2384 Schulhof". Small Bodies Data Ferret. Retrieved 9 August 2018.
    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 7 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. "LCDB Data for (2384) Schulhof". Asteroid Lightcurve Database (LCDB). Retrieved 5 July 2016.
    8. Ditteon, R.; Bixby, A. R.; Sarros, A. M.; Waters, C. T. (December 2002). "Rotation Periods and Lightcurves of 1858 Lobachevskij, 2384 Schulhof and (5515) 1989 EL1" (PDF). Minor Planet Bulletin. 29 (1): 69. Bibcode:2002MPBu...29...69D. Retrieved 18 March 2020.
    9. Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
    10. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 July 2016.
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