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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08802730433928571 2.9285e-08  
a 2.253745706826461 4.8837e-09 au
q 2.055354547588289 6.5706e-08 au
i 4.257149694911159 3.1511e-06 deg
node 82.64193773372031 4.7566e-05 deg
peri 54.97496487981795 5.1589e-05 deg
M 5.740143503741779 1.9836e-05 deg
tp 2458980.795017900777
(2020-May-11.29501790)
6.8087e-05 TDB
period 1235.821639493178
3.38
4.0169e-06
1.1e-08
d
yr
n .2913041724594168 9.4685e-10 deg/d
Q 2.452136866064632 5.3136e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2810  
   data-arc span      39554 days (108.29 yr)  
   first obs. used      1912-02-17  
   last obs. used      2020-06-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43684  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:20:45  

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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