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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .004093131733554372 3.2049e-08  
a 2.888831963604137 1.1176e-08 au
q 2.877007593821002 9.6405e-08 au
i 1.875541147534564 4.4956e-06 deg
node 180.0313348279599 9.3007e-05 deg
peri 235.5230671041127 0.00055538 deg
M 318.0384507563491 0.0005469 deg
tp 2459409.540704992608
(2021-Jul-14.04070499)
0.0027245 TDB
period 1793.419336363641
4.91
1.0407e-05
2.849e-08
d
yr
n .2007338678136148 1.1649e-09 deg/d
Q 2.900656333387271 1.1222e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2425  
   data-arc span      10987 days (30.08 yr)  
   first obs. used      1990-12-12  
   last obs. used      2021-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:44:52  

Additional Information
 Earth MOID = 1.87543 au 
 Jupiter MOID = 2.07429 au 
 T_jup = 3.291 
[ 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 13.25   n/a E2021B10  
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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