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 ]  
118268 (1998 HG61)
Classification: Main-belt Asteroid          SPK-ID: 2118268
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2976753207743603 3.34e-08  
a 3.01945811399474 1.4933e-08 au
q 2.120639951346611 1.0003e-07 au
i 9.772680242476936 5.2601e-06 deg
node 24.00644644285751 1.9984e-05 deg
peri 221.5024660234149 2.2029e-05 deg
M 86.11522833779848 8.0469e-06 deg
tp 2458742.073834573700
(2019-Sep-15.57383457)
4.1544e-05 TDB
period 1916.42550033198
5.25
1.4217e-05
3.892e-08
d
yr
n .1878497233196061 1.3935e-09 deg/d
Q 3.918276276642869 1.9378e-08 au
  Orbit Determination Parameters
   # obs. used (total)      836  
   data-arc span      8297 days (22.72 yr)  
   first obs. used      1998-03-29  
   last obs. used      2020-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53928  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:19:18  

Additional Information
 Earth MOID = 1.11802 au 
 Jupiter MOID = 1.20949 au 
 T_jup = 3.157 
[ 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 15.03   n/a E2021B55  
diameter diameter 5.412 km 0.396 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118268 (1998 HG61)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 HG61 = 2003 DJ14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-10 23:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin