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 ]  
79738 (1998 ST138)
Classification: Main-belt Asteroid          SPK-ID: 2079738
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391084818519479 6.0039e-08  
a 2.40889520725272 1.2761e-08 au
q 2.07379745203136 1.4679e-07 au
i 7.623544057276214 6.1439e-06 deg
node 7.947220015902117 3.3007e-05 deg
peri 358.5687796124361 3.6978e-05 deg
M 296.9417656138849 2.0231e-05 deg
tp 2459239.701882879917
(2021-Jan-25.20188288)
7.7708e-05 TDB
period 1365.60559735132
3.74
1.0851e-05
2.971e-08
d
yr
n .2636193061146229 2.0947e-09 deg/d
Q 2.743992962474079 1.4536e-08 au
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      7945 days (21.75 yr)  
   first obs. used      1998-09-16  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60036  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:03:31  

Additional Information
 Earth MOID = 1.07237 au 
 Jupiter MOID = 2.71416 au 
 T_jup = 3.496 
[ 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 15.4   n/a MPO468754  
rotation period rot_per 7.280 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

79738 (1998 ST138)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1998 ST138 = 2000 EN32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-09 15:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin