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 ]  
181953 (1999 TH245)
Classification: Main-belt Asteroid          SPK-ID: 2181953
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1376174387036383 5.753e-08  
a 3.131750210393019 3.2305e-08 au
q 2.700766767779152 1.8745e-07 au
i 5.421865389064939 7.1119e-06 deg
node 17.57047646302155 5.7929e-05 deg
peri 297.9216760794375 6.2276e-05 deg
M 342.3977199482823 2.467e-05 deg
tp 2459299.479561469829
(2021-Mar-25.97956147)
0.00013943 TDB
period 2024.319691792494
5.54
3.1322e-05
8.575e-08
d
yr
n .1778375231242389 2.7517e-09 deg/d
Q 3.562733653006887 3.6751e-08 au
  Orbit Determination Parameters
   # obs. used (total)      343  
   data-arc span      21795 days (59.67 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-05-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54641  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:44  

Additional Information
 Earth MOID = 1.6909 au 
 Jupiter MOID = 1.76078 au 
 T_jup = 3.191 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457103.5 (2015-Mar-22.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1359730543021109 5.7805e-08  
q 2.704107459164611 1.8747e-07 au
tp 2457282.308147446837
(2015-Sep-16.80814745)
0.00012846 TDB
node 17.6430840511016 5.7905e-05 deg
peri 298.6817772250134 6.2296e-05 deg
i 5.423507978390018 7.1123e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      343  
   data-arc span      21795 days (59.67 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-05-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54641  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:44  

Additional Information
 Jupiter MOID = 1.76078 au 
 T_jup = 3.191 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.341374966116311E-15 -1.071629836996274E-14 1.64447522315186E-12 -3.658127728217162E-15 3.698098876748194E-13 -8.443003701612425E-16
q -1.071629836996274E-14 3.514562820180477E-14 -4.183729334432704E-12 6.463220871879264E-15 -1.011021315399123E-12 4.474718252831766E-15
tp 1.64447522315186E-12 -4.183729334432704E-12 1.650196222495287E-8 -1.547421881654167E-11 2.978897479821096E-9 3.885804237680673E-12
node -3.658127728217162E-15 6.463220871879264E-15 -1.547421881654167E-11 3.352947413762175E-9 -3.340263669345573E-9 -9.191313674235038E-11
peri 3.698098876748194E-13 -1.011021315399123E-12 2.978897479821096E-9 -3.340263669345573E-9 3.88073086628254E-9 9.21351677467244E-11
i -8.443003701612425E-16 4.474718252831766E-15 3.885804237680673E-12 -9.191313674235038E-11 9.21351677467244E-11 5.058469390851964E-11

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 15.43   n/a E2021B55  
diameter diameter 5.379 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181953 (1999 TH245)          Discovered 1999-Oct-07 by CSS at Catalina
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1999 TH245 = 2005 UT294 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-25 14:29 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin