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JPL Small-Body Database Browser
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728 Leonisis (A912 DB)
Classification: Main-belt Asteroid          SPK-ID: 2000728
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08815540430492859 3.2005e-08  
a 2.253580679418612 6.1103e-09 au
q 2.054915363490689 7.0855e-08 au
i 4.257320323907953 3.2109e-06 deg
node 82.64218258457274 5.1947e-05 deg
peri 55.09987969022173 5.6064e-05 deg
M 249.1098841813551 2.1689e-05 deg
tp 2458981.125980887175
(2020-May-11.62598089)
7.4797e-05 TDB
period 1235.685904986168
3.38
5.0256e-06
1.376e-08
d
yr
n .2913361709050407 1.1849e-09 deg/d
Q 2.452245995346536 6.649e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2432  
   data-arc span      39264 days (107.50 yr)  
   first obs. used      1912-02-17  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45084  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:11:30  

Additional Information
 Earth MOID = 1.07253 au 
 Jupiter MOID = 2.56224 au 
 T_jup = 3.616 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO416711  
diameter diameter 5.887 km 0.481 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.5783 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Galad, A. (2010) Astron. Astrophys. 514, A55.]
[Pilcher, F. (2010) Minor Planet Bull. 37, 119-122.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Mas, V.; Fornas, G.; Lozano, J.; Rodrigo, O.; et al. (2018) Minor Planet Bull. 45, 76-82.]
geometric albedo albedo 0.160   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

728 Leonisis (A912 DB)          Discovered 1912-Feb-16 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A912 DB = 1941 WR = 1968 UT = A907 UE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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