Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
15720 (1990 EN1)
Classification: Main-belt Asteroid          SPK-ID: 2015720
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1517368001378937 3.3115e-08  
a 2.805495874350575 1.3919e-08 au
q 2.379798907576556 9.4474e-08 au
i 7.439548880208195 3.7067e-06 deg
node 230.6920078553958 2.7486e-05 deg
peri 350.3607155574541 2.9728e-05 deg
M 197.4888315815958 1.2164e-05 deg
tp 2460171.307097719334
(2023-Aug-14.80709772)
6.0403e-05 TDB
period 1716.377759716924
4.70
1.2773e-05
3.497e-08
d
yr
n .209744036801883 1.5609e-09 deg/d
Q 3.231192841124594 1.6031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2081  
   data-arc span      11306 days (30.95 yr)  
   first obs. used      1990-02-24  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49775  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:06:51  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Aug-01 16:58 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin