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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
20644 Amritdas (1999 TN144)
Classification: Main-belt Asteroid          SPK-ID: 2020644
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02930586925709129 3.8766e-08  
a 2.742317983101363 1.3776e-08 au
q 2.661951970827224 1.0585e-07 au
i .7742204627384028 4.0456e-06 deg
node 229.8324216148869 0.00034279 deg
peri 339.8840045350265 0.00035153 deg
M 265.2782553809975 7.8466e-05 deg
tp 2459036.937773925934
(2020-Jul-06.43777393)
0.0003621 TDB
period 1658.727879699719
4.54
1.2499e-05
3.422e-08
d
yr
n .2170337910189169 1.6354e-09 deg/d
Q 2.822683995375502 1.418e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1429  
   data-arc span      15065 days (41.25 yr)  
   first obs. used      1977-12-07  
   last obs. used      2019-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50541  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:43:36  

Additional Information
 Earth MOID = 1.65569 au 
 Jupiter MOID = 2.13871 au 
 T_jup = 3.349 
[ 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 14.3   n/a MPO381429  
diameter diameter 4.040 km 0.203 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.206   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20644 Amritdas           Discovered 1999 Oct. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Amrit Das (b. 1987) was awarded first place in the 2004 Intel International Science and Engineering Fair for his botany team project. He attends the Manhasset High School, Manhasset, New York, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

[ show close-approach data ]
Alternate Designations
 1999 TN144 = 1977 XC1 = 1995 YF8 = 1999 TH181 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-27 18:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin