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 ]  
120811 (1998 HT17)
Classification: Main-belt Asteroid          SPK-ID: 2120811
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1700893248999349 4.3407e-08  
a 2.578959760134787 1.9202e-08 au
q 2.140306235589363 1.0961e-07 au
i 3.974441977652047 6.5573e-06 deg
node 323.2553739602498 7.5765e-05 deg
peri 254.4910776236252 7.9866e-05 deg
M 110.7239235819153 3.0699e-05 deg
tp 2458535.230866614736
(2019-Feb-20.73086661)
0.00012527 TDB
period 1512.743430689378
4.14
1.6895e-05
4.626e-08
d
yr
n .2379782273031872 2.6578e-09 deg/d
Q 3.017613284680211 2.2468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      353  
   data-arc span      7768 days (21.27 yr)  
   first obs. used      1998-03-25  
   last obs. used      2019-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .669  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 17:04:59  

Additional Information
 Earth MOID = 1.13728 au 
 Jupiter MOID = 1.98031 au 
 T_jup = 3.402 
[ 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 16.2   n/a MPO432708  

120811 (1998 HT17)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HT17 = 2002 CW240 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-19 21:37 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin