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15251 (1990 EF2)
Classification: Main-belt Asteroid          SPK-ID: 2015251
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07663935800540547 4.0869e-08  
a 2.172130924848568 5.6997e-09 au
q 2.005660205264486 8.8519e-08 au
i 3.710699732655258 4.0278e-06 deg
node 252.8364378580281 5.1706e-05 deg
peri 301.6958800687955 5.5273e-05 deg
M 259.4229069025195 1.9752e-05 deg
tp 2459723.181095727422
(2022-May-23.68109573)
6.4299e-05 TDB
period 1169.303972107125
3.20
4.6024e-06
1.26e-08
d
yr
n .3078754614604344 1.2118e-09 deg/d
Q 2.33860164443265 6.1365e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1958  
   data-arc span      11322 days (31.00 yr)  
   first obs. used      1990-02-24  
   last obs. used      2021-02-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47633  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 13:58:17  

Additional Information
 Earth MOID = 1.00744 au 
 Jupiter MOID = 2.62748 au 
 T_jup = 3.681 
[ 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 15.12   n/a MPO636293  
diameter diameter 2.054 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.503   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15251 (1990 EF2)          Discovered 1990-Mar-02 by Elst, E. W. at La Silla
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 EF2 = 1994 RH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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