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 ]  
120808 (1998 HL7)
Classification: Inner Main-belt Asteroid          SPK-ID: 2120808
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05739120407631325 5.1876e-08  
a 1.977358658340692 9.8197e-09 au
q 1.863875664047797 1.0682e-07 au
i 23.02356694983451 5.5026e-06 deg
node 56.50299947869683 1.2191e-05 deg
peri 115.8926190860502 7.4234e-05 deg
M 88.18003867728817 6.6228e-05 deg
tp 2458951.732073714449
(2020-Apr-12.23207371)		 0.00018784 TDB
period 1015.609142456234
2.78		 7.5654e-06
2.071e-08		 d
yr
n .3544670729620903 2.6405e-09 deg/d
Q 2.090841652633588 1.0383e-08 au
   Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      13817 days (37.83 yr)  
   first obs. used      1982-08-22  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:36  

Additional Information
 Earth MOID = .900702 au 
 Jupiter MOID = 2.94063 au 
 T_jup = 3.764 
[ 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 16.18   n/a E2021B55  

120808 (1998 HL7)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HL7 = 1999 XT8 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Mar-07 07:30 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin