2384 Schulhof

2384 Schulhof

Shape model of Schulhof from its lightcurve
Discovery [1]
Discovered by	M. Laugier
Discovery site	Nice Obs.
Discovery date	2 March 1943
Designations
MPC designation	(2384) Schulhof
Named after	Lipót Schulhof [2] (Hungarian astronomer)
Alternative designations	1943 EC1 · 1943 GV 1960 FE · 1962 WL1 1970 RP · 1981 FF A909 BF
Minor planet category	main-belt [1][3] · (middle) Schulhof [4]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	108.97 yr (39,803 d)
Aphelion	2.9231 AU
Perihelion	2.2989 AU
Semi-major axis	2.6110 AU
Eccentricity	0.1195
Orbital period (sidereal)	4.22 yr (1,541 d)
Mean anomaly	256.37°
Mean motion	0° 14^m 0.96^s / day
Inclination	13.530°
Longitude of ascending node	7.9084°
Argument of perihelion	205.72°
Physical characteristics
Mean diameter	11.485±0.174 km[5] 11.721±0.138 km[6] 12.66 km (calculated)[7]
Synodic rotation period	3.294±0.006 h[8]
Geometric albedo	0.21 (assumed)[7] 0.2733±0.0217[6] 0.280±0.045[5]
Spectral type	S (assumed) [7]
Absolute magnitude (H)	11.7[6] 11.8[3][7]

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.

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. 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. Archived from the original on 20 September 2020. 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. Archived from the original (PDF) on 4 October 2021. 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.

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2384 Schulhof at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2384 Schulhof at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters