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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1517368001148165 3.3111e-08  
a 2.805495874358246 1.3915e-08 au
q 2.379798907647806 9.4469e-08 au
i 7.439548873860228 3.7066e-06 deg
node 230.6920080489715 2.7472e-05 deg
peri 350.3607153777323 2.9714e-05 deg
M 197.4888315724423 1.2163e-05 deg
tp 2460171.307097766153
(2023-Aug-14.80709777)
6.04e-05 TDB
period 1716.377759723964
4.70
1.2769e-05
3.496e-08
d
yr
n .2097440368010227 1.5604e-09 deg/d
Q 3.231192841068685 1.6026e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2089  
   data-arc span      11477 days (31.42 yr)  
   first obs. used      1990-02-24  
   last obs. used      2021-07-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49689  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 23:27:48  

Additional Information
 Earth MOID = 1.37231 au 
 Jupiter MOID = 1.75462 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 13.67   n/a E2021B10  
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. 2020-October); 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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