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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2440286992424298 4.0954e-08  
a 2.662996465657852 1.1716e-08 au
q 2.013148902056178 1.0959e-07 au
i 12.93923771623211 4.4569e-06 deg
node 34.06005650675748 1.7745e-05 deg
peri 308.5627443079139 1.9039e-05 deg
M 135.0892234313754 8.1354e-06 deg
tp 2458004.875550916658
(2017-Sep-08.37555092)		 3.4686e-05 TDB
period 1587.282806307122
4.35		 1.0475e-05
2.868e-08		 d
yr
n .2268026835353648 1.4968e-09 deg/d
Q 3.312844029259526 1.4576e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1525  
   data-arc span      10061 days (27.55 yr)  
   first obs. used      1991-09-12  
   last obs. used      2019-03-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .517  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:27:01  

Additional Information
 Earth MOID = 1.03394 au 
 Jupiter MOID = 2.20828 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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