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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07663420158147186 4.2512e-08  
a 2.172058521769869 6.2346e-09 au
q 2.005604551165803 9.2702e-08 au
i 3.710963002823902 4.438e-06 deg
node 252.8375344891109 5.2156e-05 deg
peri 301.8902997182357 5.7173e-05 deg
M 137.276162757779 2.2641e-05 deg
tp 2458554.640175779036
(2019-Mar-12.14017578)
7.3799e-05 TDB
period 1169.245508433702
3.20
5.0342e-06
1.378e-08
d
yr
n .3078908556016167 1.3256e-09 deg/d
Q 2.338512492373935 6.7124e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1692  
   data-arc span      11166 days (30.57 yr)  
   first obs. used      1990-02-24  
   last obs. used      2020-09-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49754  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 16:39:53  

Additional Information
 Earth MOID = 1.00659 au 
 Jupiter MOID = 2.62963 au 
 T_jup = 3.681 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1   n/a MPO473973  
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

[ show close-approach data ]
Alternate Designations
 1990 EF2 = 1994 RH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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