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JPL Small-Body Database Browser
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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1519302138383923 3.4625e-08  
a 2.805344971597965 1.5837e-08 au
q 2.379128310172628 1.0067e-07 au
i 7.440113769680997 3.9074e-06 deg
node 230.6914501808723 2.9749e-05 deg
peri 350.451261234298 3.2369e-05 deg
M 114.299296350171 1.2382e-05 deg
tp 2458455.597383097227
(2018-Dec-03.09738310)
5.8484e-05 TDB
period 1716.239280109135
4.70
1.4533e-05
3.979e-08
d
yr
n .2097609605911757 1.7763e-09 deg/d
Q 3.231561633023303 1.8243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1735  
   data-arc span      10778 days (29.51 yr)  
   first obs. used      1990-02-24  
   last obs. used      2019-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52948  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:20:41  

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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