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39923 (1998 FT57)
Classification: Main-belt Asteroid          SPK-ID: 2039923
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1302977589556653 4.1115e-08  
a 2.382222069497411 1.0652e-08 au
q 2.071823872507171 9.6878e-08 au
i 7.120976786653249 5.1507e-06 deg
node 208.5116646087737 3.3991e-05 deg
peri 105.0197745904483 4.1781e-05 deg
M 258.6593467917531 2.9086e-05 deg
tp 2459378.553263136540
(2021-Jun-13.05326314)
0.00010996 TDB
period 1342.986949664528
3.68
9.008e-06
2.466e-08
d
yr
n .2680591945364223 1.798e-09 deg/d
Q 2.692620266487651 1.204e-08 au
  Orbit Determination Parameters
   # obs. used (total)      995  
   data-arc span      10466 days (28.65 yr)  
   first obs. used      1991-06-10  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58286  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:38:55  

Additional Information
 Earth MOID = 1.07215 au 
 Jupiter MOID = 2.57474 au 
 T_jup = 3.516 
[ 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 15.0   n/a MPO468240  
diameter diameter 1.840 km 0.257 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.522   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39923 (1998 FT57)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FT57 = 1999 RM196 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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