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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
15251 (1990 EF2)
Classification: Main-belt Asteroid          SPK-ID: 2015251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07663423147193216 4.325e-08  
a 2.172058517055488 6.388e-09 au
q 2.005604481888876 9.454e-08 au
i 3.710960704414044 4.6146e-06 deg
node 252.8375184842325 5.2358e-05 deg
peri 301.8903390975389 5.7881e-05 deg
M 137.2761420949423 2.3633e-05 deg
tp 2458554.640244341536
(2019-Mar-12.14024434)
7.7133e-05 TDB
period 1169.24550462699
3.20
5.1581e-06
1.412e-08
d
yr
n .307890856604017 1.3582e-09 deg/d
Q 2.3385125522221 6.8775e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1601  
   data-arc span      10767 days (29.48 yr)  
   first obs. used      1990-02-24  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5012  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:19:35  

Additional Information
 Earth MOID = 1.00659 au 
 Jupiter MOID = 2.62963 au 
 T_jup = 3.681 
[ 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 15.1   n/a MPO473973  
diameter diameter 2.054 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.503   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15251 (1990 EF2)          Discovered 1990-Mar-02 by Elst, E. W. at La Silla
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 EF2 = 1994 RH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-08 21:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin