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19562 (1999 JM81)
Classification: Main-belt Asteroid          SPK-ID: 2019562
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909762091051963 2.4624e-08  
a 2.593076240430665 9.7516e-09 au
q 2.097860370112462 6.5248e-08 au
i 12.25356381223644 1.1935e-06 deg
node 282.7739618477585 4.7798e-06 deg
peri 69.28127315797033 1.09e-05 deg
M 17.50601171904082 5.4974e-06 deg
tp 2459126.333792855003
(2020-Oct-03.83379286)
2.3403e-05 TDB
period 1525.180892182208
4.18
8.6035e-06
2.356e-08
d
yr
n .2360375755068089 1.3315e-09 deg/d
Q 3.088292110748867 1.1614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2206  
   data-arc span      24195 days (66.24 yr)  
   first obs. used      1954-12-22  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39761  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:56:13  

Additional Information
 Earth MOID = 1.12529 au 
 Jupiter MOID = 2.43242 au 
 T_jup = 3.361 
[ 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 13.43   n/a E2021B10  
diameter diameter 6.939 km 0.332 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.211   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19562 (1999 JM81)          Discovered 1999-May-14 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JM81 = 1978 PT = 1987 XC1 = 1991 VE7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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