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21140 (1993 FN28)
Classification: Main-belt Asteroid          SPK-ID: 2021140
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2115836843975831 4.5411e-08  
a 2.588407865708889 1.2054e-08 au
q 2.040742992758517 1.1597e-07 au
i 3.984168137552039 4.6856e-06 deg
node 338.8087921894923 6.2658e-05 deg
peri 198.2834941058651 6.3293e-05 deg
M 244.821043998677 1.1178e-05 deg
tp 2459687.151571509058
(2022-Apr-17.65157151)		 4.9108e-05 TDB
period 1521.064019205455
4.16		 1.0626e-05
2.909e-08		 d
yr
n .2366764287725706 1.6533e-09 deg/d
Q 3.13607273865926 1.4605e-08 au
   Orbit Determination Parameters
   # obs. used (total)      689  
   data-arc span      10157 days (27.81 yr)  
   first obs. used      1993-03-21  
   last obs. used      2021-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56101  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:07  

Additional Information
 Earth MOID = 1.04508 au 
 Jupiter MOID = 1.83377 au 
 T_jup = 3.386 
[ 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 15.5   n/a MPO449107  
diameter diameter 2.071 km 0.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.285   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21140 (1993 FN28)          Discovered 1993-Mar-21 by UESAC at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 FN28 = 1997 BB9 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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