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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
91722 (1999 TW157)
Classification: Main-belt Asteroid          SPK-ID: 2091722
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0671382243814998 3.6722e-08  
a 2.979332261300602 1.9447e-08 au
q 2.779305183434361 1.1724e-07 au
i 11.70632677356686 4.2285e-06 deg
node 71.89869861030162 2.5096e-05 deg
peri 12.3923298614513 4.9401e-05 deg
M 44.97558879208781 4.1289e-05 deg
tp 2459161.833447751321
(2020-Nov-08.33344775)
0.00021534 TDB
period 1878.35136967426
5.14
1.839e-05
5.035e-08
d
yr
n .1916574320503359 1.8765e-09 deg/d
Q 3.179359339166843 2.0752e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1168  
   data-arc span      7909 days (21.65 yr)  
   first obs. used      1999-10-09  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55477  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 08:56:19  

Additional Information
 Earth MOID = 1.79607 au 
 Jupiter MOID = 2.06531 au 
 T_jup = 3.225 
[ 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 14.13   n/a MPCxxxxx  

91722 (1999 TW157)          Discovered 1999-Oct-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 TW157 = 2001 DD52 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-21 02:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin