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15720 (1990 EN1)
Classification: Main-belt Asteroid          SPK-ID: 2015720
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .151930222595743 3.4455e-08  
a 2.805344967502828 1.5617e-08 au
q 2.379128282132276 9.9959e-08 au
i 7.440113875792936 3.883e-06 deg
node 230.691462643864 2.96e-05 deg
peri 350.4512504064649 3.2163e-05 deg
M 114.2992987385573 1.2329e-05 deg
tp 2458455.597372904141
(2018-Dec-03.09737290)
5.8151e-05 TDB
period 1716.239276351183
4.70
1.4331e-05
3.924e-08
d
yr
n .2097609610504774 1.7516e-09 deg/d
Q 3.231561652873381 1.799e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1761  
   data-arc span      11115 days (30.43 yr)  
   first obs. used      1990-02-24  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52474  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:01:38  

Additional Information
 Earth MOID = 1.37107 au 
 Jupiter MOID = 1.75659 au 
 T_jup = 3.294 
[ 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 13.6   n/a MPO347648  
diameter diameter 10.919 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 1.15 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.057   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15720 (1990 EN1)          Discovered 1990-Mar-02 by Elst, E. W. at La Silla
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 EN1 = 1995 GD7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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