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39946 (1998 FP111)
Classification: Main-belt Asteroid          SPK-ID: 2039946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2723894931691255 5.0987e-08  
a 2.366764080558362 1.02e-08 au
q 1.722082412204178 1.2208e-07 au
i 21.84403402682804 6.442e-06 deg
node 213.1214183555479 1.2985e-05 deg
peri 285.7574895944481 1.7308e-05 deg
M 68.92330808064656 9.2664e-06 deg
tp 2458745.878838851096
(2019-Sep-19.37883885)
3.3899e-05 TDB
period 1329.936425952603
3.64
8.597e-06
2.354e-08
d
yr
n .2706896307033174 1.7498e-09 deg/d
Q 3.011445748912545 1.2978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1161  
   data-arc span      25636 days (70.19 yr)  
   first obs. used      1949-11-23  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50311  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:39:54  

Additional Information
 Earth MOID = .852281 au 
 Jupiter MOID = 2.35223 au 
 T_jup = 3.403 
[ 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 14.3   n/a MPO459140  
diameter diameter 2.812 km 0.449 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.362   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39946 (1998 FP111)          Discovered 1998-Mar-31 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FP111 = 1978 WB20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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