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30809 (1990 EO8)
Classification: Main-belt Asteroid          SPK-ID: 2030809
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08125849327532074 1.687e-08  
a 2.717066319905088 9.8117e-09 au
q 2.49628160462048 4.7456e-08 au
i 9.818480953865446 3.6912e-07 deg
node 349.2059460949351 4.4555e-06 deg
peri 179.6904492848352 1.2365e-05 deg
M 356.4227804405291 1.1848e-05 deg
tp 2459412.755183685868
(2021-Jul-17.25518369)
5.3837e-05 TDB
period 1635.869990540375
4.48
8.8611e-06
2.426e-08
d
yr
n .2200663879658808 1.192e-09 deg/d
Q 2.937851035189696 1.0609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2610  
   data-arc span      11903 days (32.59 yr)  
   first obs. used      1988-11-05  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42507  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:45:57  

Additional Information
 Earth MOID = 1.50335 au 
 Jupiter MOID = 2.03296 au 
 T_jup = 3.334 
[ 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 13.35   n/a MPO614063  
diameter diameter 9.223 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.119   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30809 (1990 EO8)          Discovered 1990-Mar-07 by Debehogne, H. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 EO8 = 1988 VT8 = 1999 GC22 = 2001 QP240 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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