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 ]  
70536 (1999 TW121)
Classification: Main-belt Asteroid          SPK-ID: 2070536
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1140294266526596 2.149e-07  
a 2.527496515352933 9.753e-09 au
q 2.239287536840644 5.4592e-07 au
i 5.412934134571175 4.4202e-06 deg
node 341.2912812701798 3.5487e-05 deg
peri 193.7324189065575 4.2357e-05 deg
M 307.5322113445998 3.9631e-05 deg
tp 2459414.406772439555
(2021-Jul-18.90677244)
0.00016205 TDB
period 1467.689796953428
4.02
8.4952e-06
2.326e-08
d
yr
n .2452834384672249 1.4197e-09 deg/d
Q 2.815705493865223 1.0865e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1614  
   data-arc span      16042 days (43.92 yr)  
   first obs. used      1977-02-19  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50263  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:41:14  

Additional Information
 Earth MOID = 1.24414 au 
 Jupiter MOID = 2.15385 au 
 T_jup = 3.437 
[ 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 14.58   n/a E2021B10  
diameter diameter 4.068 km 0.483 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.185   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70536 (1999 TW121)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TW121 = 1977 DR5 = 1993 DY2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Mar-03 02:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin