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21385 (1998 FV8)
Classification: Main-belt Asteroid          SPK-ID: 2021385
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1620953095800816 3.6168e-08  
a 2.400010970686039 1.0672e-08 au
q 2.010980449397093 8.9799e-08 au
i 2.383066075040696 3.9196e-06 deg
node 81.73614160797425 0.00010914 deg
peri 185.1445310501971 0.00011041 deg
M 39.36473431080973 2.0464e-05 deg
tp 2459248.001149789585
(2021-Feb-02.50114979)
7.6625e-05 TDB
period 1358.057840646198
3.72
9.0578e-06
2.48e-08
d
yr
n .2650844383982223 1.768e-09 deg/d
Q 2.789041491974984 1.2401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1126  
   data-arc span      10952 days (29.98 yr)  
   first obs. used      1991-07-13  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55684  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:03:55  

Additional Information
 Earth MOID = .995005 au 
 Jupiter MOID = 2.28975 au 
 T_jup = 3.507 
[ 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 15.53   n/a E2021B10  
diameter diameter 1.910 km 0.327 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.232   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21385 (1998 FV8)          Discovered 1998-Mar-22 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FV8 = 1991 NF9 = 1994 CG20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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