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15680 (1981 EV7)
Classification: Main-belt Asteroid          SPK-ID: 2015680
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .050081919445028 3.1976e-08  
a 2.745831441589201 1.2888e-08 au
q 2.608314932521905 8.9178e-08 au
i 4.282056949061903 3.6645e-06 deg
node 254.5858119202785 5.2005e-05 deg
peri 67.83067630355664 6.7215e-05 deg
M 77.75488019671745 4.1245e-05 deg
tp 2458641.549640053686
(2019-Jun-07.04964005)
0.00019068 TDB
period 1661.916644379684
4.55
1.1701e-05
3.204e-08
d
yr
n .2166173623794299 1.5251e-09 deg/d
Q 2.883347950656496 1.3534e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1367  
   data-arc span      15121 days (41.40 yr)  
   first obs. used      1978-09-01  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:24:45  

Additional Information
 Earth MOID = 1.59918 au 
 Jupiter MOID = 2.27335 au 
 T_jup = 3.342 
[ 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 14.5   n/a MPO502289  
diameter diameter 6.489 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.088   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15680 (1981 EV7)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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