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 ]  
52733 (1998 HP21)
Classification: Main-belt Asteroid          SPK-ID: 2052733
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1790005029199796 4.0568e-08  
a 3.109021231741375 2.3804e-08 au
q 2.552504867670774 1.2955e-07 au
i 15.48938890615355 5.0986e-06 deg
node 200.2361265962855 1.8395e-05 deg
peri 289.104569858413 2.3582e-05 deg
M 61.36489888954971 1.4373e-05 deg
tp 2458659.188060332122
(2019-Jun-24.68806033)
7.9153e-05 TDB
period 2002.322182614418
5.48
2.2996e-05
6.296e-08
d
yr
n .1797912459472184 2.0649e-09 deg/d
Q 3.665537595811975 2.8065e-08 au
  Orbit Determination Parameters
   # obs. used (total)      582  
   data-arc span      9726 days (26.63 yr)  
   first obs. used      1993-06-16  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 10:34:30  

Additional Information
 Earth MOID = 1.61529 au 
 Jupiter MOID = 1.62375 au 
 T_jup = 3.139 
[ 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 14.7   n/a MPO426285  

52733 (1998 HP21)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HP21 = 2001 SN235 
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-06 00:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin