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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08802730330751238 3.0046e-08  
a 2.253745702860338 5.7385e-09 au
q 2.055354546296649 6.7058e-08 au
i 4.257149352221922 3.2046e-06 deg
node 82.64194242610056 4.9258e-05 deg
peri 54.97496382779786 5.3345e-05 deg
M 5.740141900736959 2.0672e-05 deg
tp 2458980.795023455648
(2020-May-11.29502346)
7.0953e-05 TDB
period 1235.821636230995
3.38
4.72e-06
1.292e-08
d
yr
n .2913041732283687 1.1126e-09 deg/d
Q 2.452136859424028 6.2436e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2595  
   data-arc span      39403 days (107.88 yr)  
   first obs. used      1912-02-17  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44335  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:38:28  

Additional Information
 Earth MOID = 1.07254 au 
 Jupiter MOID = 2.561 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 12.9   n/a MPO502160  
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-August); 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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