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 ]  
20955 (2387 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2020955
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1058027584763553 3.959e-08  
a 3.124721959455529 1.7535e-08 au
q 2.794117756673492 1.3001e-07 au
i 3.864407222558055 3.9707e-06 deg
node 255.8777316944716 6.0744e-05 deg
peri 74.33680585027388 6.3415e-05 deg
M 296.411679651532 1.8253e-05 deg
tp 2459356.861147582186
(2021-May-22.36114758)
0.00010301 TDB
period 2017.509071265756
5.52
1.6983e-05
4.65e-08
d
yr
n .1784378594016141 1.502e-09 deg/d
Q 3.455326162237566 1.939e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1427  
   data-arc span      15684 days (42.94 yr)  
   first obs. used      1977-10-07  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51355  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:59:43  

Additional Information
 Earth MOID = 1.78638 au 
 Jupiter MOID = 1.86915 au 
 T_jup = 3.203 
[ 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 13.6   n/a MPO302193  
diameter diameter 6.213 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.182   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20955 (2387 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2387 T-3 = 1999 TP111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-27 12:50 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin