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8740 Vaclav (1998 AS8)
Classification: Main-belt Asteroid          SPK-ID: 2008740
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .004104777221108622 3.6142e-08  
a 2.889668433300016 1.4955e-08 au
q 2.87780698813845 1.0424e-07 au
i 1.875200246158215 4.548e-06 deg
node 180.0329488106802 0.00012081 deg
peri 231.0176619065651 0.00057718 deg
M 282.3870974209777 0.00056506 deg
tp 2459387.313722204766
(2021-Jun-21.81372220)
0.0028167 TDB
period 1794.19832742287
4.91
1.3929e-05
3.814e-08
d
yr
n .200646714745907 1.5577e-09 deg/d
Q 2.901529878461583 1.5017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1972  
   data-arc span      10487 days (28.71 yr)  
   first obs. used      1990-12-12  
   last obs. used      2019-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51312  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:02:18  

Additional Information
 Earth MOID = 1.87726 au 
 Jupiter MOID = 2.07518 au 
 T_jup = 3.290 
[ 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 13.2   n/a MPO350871  
diameter diameter 5.940 km 0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.316   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8740 Vaclav (1998 AS8)          Discovered 1998-Jan-12 by Klet at Klet
Reference: 19980511/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 AS8 = 1991 UY2 = 1991 VO17 = 1993 BN13 = 1996 VN38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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