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 ]  
181838 (1998 SQ165)
Classification: Outer Main-belt Asteroid          SPK-ID: 2181838
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07767390892738298 4.4428e-08  
a 3.212173511301592 3.7035e-08 au
q 2.9626714385258 1.4668e-07 au
i 5.497699595495687 5.0705e-06 deg
node 206.0184169273786 5.1067e-05 deg
peri 118.5259414536477 6.072e-05 deg
M 344.5512620183499 3.3544e-05 deg
tp 2459290.737577567923
(2021-Mar-17.23757757)
0.00019642 TDB
period 2102.794931407218
5.76
3.6366e-05
9.956e-08
d
yr
n .1712007170186031 2.9608e-09 deg/d
Q 3.461675584077384 3.9911e-08 au
  Orbit Determination Parameters
   # obs. used (total)      535  
   data-arc span      7634 days (20.90 yr)  
   first obs. used      1998-09-16  
   last obs. used      2019-08-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51646  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:15  

Additional Information
 Earth MOID = 1.95425 au 
 Jupiter MOID = 1.81229 au 
 T_jup = 3.179 
[ 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 15.07   n/a MPCxxxxx  

181838 (1998 SQ165)          Discovered 1998-Sep-18 by CSS at Catalina
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1998 SQ165 = 2004 TN241 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-11 16:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin