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 ]  
173210 (1998 SM42)
Classification: Main-belt Asteroid          SPK-ID: 2173210
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1201905858582952 5.1337e-08  
a 2.477469145484586 1.2533e-08 au
q 2.179700677442944 1.2325e-07 au
i 1.531388774597125 4.4582e-06 deg
node 203.3561252110902 0.00013261 deg
peri 343.9456294155283 0.00013344 deg
M 12.91777464278589 1.3679e-05 deg
tp 2458949.391161464672
(2020-Apr-09.89116146)
5.422e-05 TDB
period 1424.330612780379
3.90
1.0808e-05
2.959e-08
d
yr
n .2527503072459127 1.918e-09 deg/d
Q 2.775237613526229 1.404e-08 au
  Orbit Determination Parameters
   # obs. used (total)      677  
   data-arc span      7908 days (21.65 yr)  
   first obs. used      1998-09-28  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58871  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:23:55  

Additional Information
 Earth MOID = 1.18075 au 
 Jupiter MOID = 2.1828 au 
 T_jup = 3.470 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO469856  

173210 (1998 SM42)          Discovered 1998-Sep-28 by Spacewatch at Kitt Peak
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

Alternate Designations
 1998 SM42 = 2002 TT56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-28 00:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin