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21145 (1993 FZ57)
Classification: Main-belt Asteroid          SPK-ID: 2021145
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1035260845486253 4.8622e-08  
a 2.709003253461412 1.3835e-08 au
q 2.428550753601065 1.3412e-07 au
i 2.208327690956379 5.2514e-06 deg
node 216.0378010462407 0.00010318 deg
peri 162.4726447565286 0.00010473 deg
M 239.3591555067661 1.9456e-05 deg
tp 2459746.263622435071
(2022-Jun-15.76362244)
8.9716e-05 TDB
period 1628.59357377629
4.46
1.2476e-05
3.416e-08
d
yr
n .2210496257609887 1.6934e-09 deg/d
Q 2.989455753321759 1.5268e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1023  
   data-arc span      9946 days (27.23 yr)  
   first obs. used      1993-03-19  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51755  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:40:29  

Additional Information
 Earth MOID = 1.42919 au 
 Jupiter MOID = 2.46625 au 
 T_jup = 3.355 
[ 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 15.05   n/a E2021B10  
diameter diameter 3.222 km 0.457 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.187   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21145 (1993 FZ57)          Discovered 1993-Mar-19 by UESAC at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 FZ57 = 1995 WA38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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