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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456138.5 (2012-Jul-30.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08832945149221511 3.0077e-08  
q 2.054591980870658 6.7213e-08 au
tp 2456509.895910296097
(2013-Aug-05.39591030)
7.0077e-05 TDB
node 82.67346757618424 4.9283e-05 deg
peri 55.25391168785394 5.3341e-05 deg
i 4.256714602036024 3.204e-06 deg
  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
 Jupiter MOID = 2.561 au 
 T_jup = 3.616 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.046098720740969E-16 -2.015624599596719E-15 3.972162667922059E-13 -3.586546940535203E-16 1.19040182381182E-13 -1.572557975640195E-16
q -2.015624599596719E-15 4.517586824678244E-15 -8.956608455025811E-13 7.265080591001932E-16 -2.709672517703604E-13 3.656543994583147E-16
tp 3.972162667922059E-13 -8.956608455025811E-13 4.910847370406168E-9 -8.43669576330102E-13 1.442982716794019E-9 -2.860707032641438E-14
node -3.586546940535203E-16 7.265080591001932E-16 -8.43669576330102E-13 2.428769346870554E-9 -2.422048401437487E-9 -2.537792525519748E-11
peri 1.19040182381182E-13 -2.709672517703604E-13 1.442982716794019E-9 -2.422048401437487E-9 2.845251557310933E-9 2.528646630499862E-11
i -1.572557975640195E-16 3.656543994583147E-16 -2.860707032641438E-14 -2.537792525519748E-11 2.528646630499862E-11 1.026539147379171E-11

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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