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1378 Leonce - Wikipedia

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1378 Leonce
Discovery^[1]
Lightcurve-based 3D-model of Leonce
Discovered by	F. Rigaux
Discovery site	Uccle Obs.
Discovery date	21 February 1936
Designations
MPC designation	(1378) Leonce
Named after	Leonce Rigaux^[2] (discoverer's father)
Alternative designations	1936 DB · 1958 FG 1958 GY · 1962 KB A915 RC · A915 WA
Minor planet category	main-belt · (inner)^[3] Nysa^[4]
Orbital characteristics^[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	101.54 yr (37,088 days)
Aphelion	2.7300 AU
Perihelion	2.0187 AU
Semi-major axis	2.3743 AU
Eccentricity	0.1498
Orbital period (sidereal)	3.66 yr (1,336 days)
Mean anomaly	38.698°
Mean motion	0° 16^m 9.84^s / day
Inclination	3.5913°
Longitude of ascending node	43.568°
Argument of perihelion	202.15°
Physical characteristics
Dimensions	14.94±3.81 km^[5] 18.16 km (derived)^[3] 18.18±1.4 km^[6] 20.54±0.13 km^[7] 21.228±0.070 km^[8] 22.20±0.33 km^[9] 22.456±0.170 km^[10]
Synodic rotation period	4.3250±0.0002 h^[11] 4.325±0.001 h^[12] 4.32527±0.00005 h^[13] 4.3586±0.0002 h^[11]
Geometric albedo	0.0348±0.0046^[10] 0.053±0.002^[9] 0.061±0.002^[7] 0.0706 (derived)^[3] 0.0773±0.013^[6] 0.10±0.05^[5]
Spectral type	C (assumed)^[3]
Absolute magnitude (H)	11.94±0.22^[14] · 12.10^[6]^[7]^[9]^[10] · 12.20^[1]^[3]^[5]

1378 Leonce, provisional designation 1936 DB, is a dark Nysian asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 21 February 1936, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle, who named it after his father, Leonce Rigaux.^[2]^[15]

Orbit and classification

Leonce is a member of the Nysa family (405),^[4] also known as the Nysa-Polana complex, the largest grouping of almost 20 thousand known asteroids in the main belt, consisting of several sub-asteroid families.^[16]^: 23

It orbits the Sun in the inner asteroid belt at a distance of 2.0–2.7 AU once every 3 years and 8 months (1,336 days). Its orbit has an eccentricity of 0.15 and an inclination of 4° with respect to the ecliptic.^[1]

The asteroid was first identified as 1915 RC at Heidelberg Observatory in September 1915. One week later, the body's observation arc begins at Bergedorf Observatory, more than 20 years prior to its official discovery observation at Uccle.^[15]

Physical characteristics

Leonce is an assumed carbonaceous C-type asteroid.^[3]

Rotation period and poles

In 2002, 2007 and 2017, three rotational light curves of Leonce were obtained from photometric observations by amateur astronomers René Roy, Laurent Bernasconi and Daniel Klinglesmith and colleagues at Etscorn Observatory (719), respectively. Analysis gave a well-defined light curve with a consolidated rotation period of 4.3250 hours and a brightness amplitude between 0.49 and 0.63 magnitude (U=3/3/3).^[3]^[11]^[12]

In addition a modeled light curve, using photometric data from various sources, gave a period of 4.32527 hours, as well as two spin axes of (210.0°, −67.0°) and (46.0°, −77.0°) in ecliptic coordinates.^[13]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Leonce measures between 14.94 and 22.456 kilometers in diameter and its surface has an albedo between 0.0348 and 0.10.^[5]^[6]^[7]^[8]^[9]^[10]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0706 and a diameter of 18.16 kilometers based on an absolute magnitude of 12.2.^[3]

Naming

This minor planet was named after Leonce Rigaux, father of the discoverer astronomer Fernand Rigaux. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 125).^[2]

References

^ ^a ^b ^c ^d "JPL Small-Body Database Browser: 1378 Leonce (1936 DB)" (2017-03-28 last obs.). Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 31 October 2017.
^ ^a ^b ^c Schmadel, Lutz D. (2007). "(1378) Leonce". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 112. doi:10.1007/978-3-540-29925-7_1379. ISBN 978-3-540-00238-3.
^ ^a ^b ^c ^d ^e ^f ^g ^h "LCDB Data for (1378) Leonce". Asteroid Lightcurve Database (LCDB). Retrieved 31 October 2017.
^ ^a ^b "Asteroid 1378 Leonce – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
^ ^a ^b ^c ^d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 31 October 2017.
^ ^a ^b ^c ^d 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.
^ ^a ^b ^c ^d 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 31 October 2017.
^ ^a ^b 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 31 October 2017.
^ ^a ^b ^c ^d 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)
^ ^a ^b ^c ^d 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.
^ ^a ^b ^c Behrend, Raoul. "Asteroids and comets rotation curves – (1378) Leonce". Geneva Observatory. Retrieved 31 October 2017.
^ ^a ^b Klinglesmith, Daniel A. III; Hanowell, Jesse; Risley, Ethan; Turk, Janek; Vargas, Angelica; Warren, Curtis Alan (October 2013). "Inversion Model Candidates". The Minor Planet Bulletin. 40 (4): 190–193. Bibcode:2013MPBu...40..190K. ISSN 1052-8091. Retrieved 31 October 2017.
^ ^a ^b 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 31 October 2017.
^ 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 31 October 2017.
^ ^a ^b "1378 Leonce (1936 DB)". Minor Planet Center. Retrieved 31 October 2017.
^ 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 978-0-8165-3213-1.

External links

Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
1378 Leonce at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
1378 Leonce at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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