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 ]  
48878 (1998 HQ118)
Classification: Main-belt Asteroid          SPK-ID: 2048878
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1472897327006786 3.4037e-08  
a 3.048799967928596 1.7281e-08 au
q 2.599743035594556 1.035e-07 au
i 16.06770528724272 4.0947e-06 deg
node 132.3281315069179 1.6121e-05 deg
peri 343.8357864711234 2.3248e-05 deg
M 138.0260268708435 1.5955e-05 deg
tp 2458254.995430547638
(2018-May-16.49543055)
8.5171e-05 TDB
period 1944.427808923209
5.32
1.6532e-05
4.526e-08
d
yr
n .1851444411296308 1.5742e-09 deg/d
Q 3.497856900262637 1.9827e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1447  
   data-arc span      9513 days (26.05 yr)  
   first obs. used      1993-06-15  
   last obs. used      2019-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4745  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:15:50  

Additional Information
 Earth MOID = 1.61917 au 
 Jupiter MOID = 1.59746 au 
 T_jup = 3.162 
[ 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 13.3   n/a MPO474367  

48878 (1998 HQ118)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HQ118 = 2000 QC191 
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-04 13:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin