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 ]  
39987 (1998 HJ33)
Classification: Main-belt Asteroid          SPK-ID: 2039987
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .13768432479459 2.9068e-08  
a 2.454931654875588 1.0378e-08 au
q 2.116926047557177 7.31e-08 au
i 1.783883804710108 4.5703e-06 deg
node 328.4611096368789 0.00010883 deg
peri 253.0349153668534 0.00011029 deg
M 152.0288822493624 1.8416e-05 deg
tp 2458007.190725179084
(2017-Sep-10.69072518)
7.084e-05 TDB
period 1404.939217965115
3.85
8.9086e-06
2.439e-08
d
yr
n .256238843215877 1.6248e-09 deg/d
Q 2.792937262193999 1.1807e-08 au
  Orbit Determination Parameters
   # obs. used (total)      884  
   data-arc span      17789 days (48.70 yr)  
   first obs. used      1971-03-24  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56423  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:12:26  

Additional Information
 Earth MOID = 1.10952 au 
 Jupiter MOID = 2.18867 au 
 T_jup = 3.480 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO449244  

39987 (1998 HJ33)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HJ33 = 1082 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-28 04:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin