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 ]  
48873 (1998 HS99)
Classification: Main-belt Asteroid          SPK-ID: 2048873
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2305046953528697 2.6346e-08  
a 2.248798138840339 8.0461e-09 au
q 1.730439608936846 5.8619e-08 au
i 5.632885572210517 4.1012e-06 deg
node 177.3799597726793 4.3438e-05 deg
peri 140.7053350778632 4.4903e-05 deg
M 127.1200162470095 1.2375e-05 deg
tp 2458565.553765279141
(2019-Mar-23.05376528)
4.1219e-05 TDB
period 1231.754440585141
3.37
6.6107e-06
1.81e-08
d
yr
n .292266046005877 1.5686e-09 deg/d
Q 2.767156668743832 9.9008e-09 au
  Orbit Determination Parameters
   # obs. used (total)      790  
   data-arc span      12814 days (35.08 yr)  
   first obs. used      1985-09-20  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49412  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:35:23  

Additional Information
 Earth MOID = .722072 au 
 Jupiter MOID = 2.56314 au 
 T_jup = 3.587 
[ 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 15.7   n/a MPO432046  

48873 (1998 HS99)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HS99 = 1985 SJ4 = 2000 AZ108 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Dec-02 14:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin