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17977 (1999 JR54)
Classification: Main-belt Asteroid          SPK-ID: 2017977
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .244424987056634 4.0445e-08  
a 2.662166212356801 1.1346e-08 au
q 2.011466270358881 1.0852e-07 au
i 12.94111865338212 4.3794e-06 deg
node 34.0491614585562 1.6611e-05 deg
peri 308.5631156587335 1.7782e-05 deg
M 225.8485353048104 8.2835e-06 deg
tp 2459591.713164098970
(2022-Jan-12.21316410)
3.8401e-05 TDB
period 1586.540553688499
4.34
1.0143e-05
2.777e-08
d
yr
n .2269087916870749 1.4506e-09 deg/d
Q 3.31286615435472 1.412e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1688  
   data-arc span      10513 days (28.78 yr)  
   first obs. used      1991-09-12  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51049  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:17:41  

Additional Information
 Earth MOID = 1.03313 au 
 Jupiter MOID = 2.21181 au 
 T_jup = 3.306 
[ 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 14.1   n/a MPO467902  
diameter diameter 6.095 km 0.203 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.157   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17977 (1999 JR54)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 JR54 = 1991 RT24 = 1998 FC87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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