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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2444249886461209 4.0886e-08  
a 2.662166212762368 1.163e-08 au
q 2.011466266433839 1.0942e-07 au
i 12.94111802128542 4.4317e-06 deg
node 34.04915630495373 1.7628e-05 deg
peri 308.5631203395002 1.8884e-05 deg
M 225.8485353411324 8.3393e-06 deg
tp 2459591.713164073999
(2022-Jan-12.21316407)		 3.8551e-05 TDB
period 1586.540554051051
4.34		 1.0397e-05
2.847e-08		 d
yr
n .2269087916352223 1.4869e-09 deg/d
Q 3.312866159090896 1.4473e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1541  
   data-arc span      10368 days (28.39 yr)  
   first obs. used      1991-09-12  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51817  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:16:40  

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

[ show close-approach data ]
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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