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319 Leona (A891 TA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000319
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2165423258564553 3.3418e-08  
a 3.403962287309336 1.2375e-08 au
q 2.666860376487712 1.1191e-07 au
i 10.56291686744592 3.5046e-06 deg
node 184.9363611503922 1.8406e-05 deg
peri 228.0960512696775 1.9465e-05 deg
M 178.611508579501 8.2911e-06 deg
tp 2457862.394624765928
(2017-Apr-18.89462477)
4.9517e-05 TDB
period 2293.905573849951
6.28
1.2509e-05
3.425e-08
d
yr
n .1569375845736309 8.5584e-10 deg/d
Q 4.141064198130959 1.5055e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3118  
   data-arc span      47053 days (128.82 yr)  
   first obs. used      1891-10-09  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43121  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:14:13  

Additional Information
 Earth MOID = 1.69116 au 
 Jupiter MOID = 1.37352 au 
 T_jup = 3.081 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.2   n/a MPO473765  
diameter diameter 49.943 km 0.477 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 430. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Franco, L.; Pravec, P. (2017) Minor Planet Bull. 44, 87-90.]
geometric albedo albedo 0.085   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

319 Leona (A891 TA)          Discovered 1891-Oct-08 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A891 TA = A920 HE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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