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 ]  
74939 (1999 TO174)
Classification: Main-belt Asteroid          SPK-ID: 2074939
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1205640462904344 3.5164e-08  
a 2.37519105734523 9.2416e-09 au
q 2.088828412758834 8.7983e-08 au
i 4.51799326603866 4.2522e-06 deg
node 355.5635107593359 4.1912e-05 deg
peri 306.0175701114381 4.5896e-05 deg
M 300.3631194053756 1.811e-05 deg
tp 2459221.992318489815
(2021-Jan-07.49231849)
6.7311e-05 TDB
period 1337.045698254058
3.66
7.8034e-06
2.136e-08
d
yr
n .2692503333805984 1.5714e-09 deg/d
Q 2.661553701931626 1.0356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      978  
   data-arc span      8093 days (22.16 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55835  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:51:28  

Additional Information
 Earth MOID = 1.07742 au 
 Jupiter MOID = 2.5421 au 
 T_jup = 3.528 
[ 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 MPO223683  

74939 (1999 TO174)          Discovered 1999-Oct-10 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TO174 = 1998 HL87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-12 16:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin