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 ]  
21180 (1994 DC)
Classification: Main-belt Asteroid          SPK-ID: 2021180
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1995294432307767 3.1061e-08  
a 2.394870266003698 8.6084e-09 au
q 1.917023135218038 7.5282e-08 au
i 8.907216229192205 5.2025e-06 deg
node 354.4123610452912 2.0653e-05 deg
peri 243.6934625303605 2.5116e-05 deg
M 31.74773188439028 1.3751e-05 deg
tp 2459081.119988062769
(2020-Aug-19.61998806)
5.1765e-05 TDB
period 1353.696839002668
3.71
7.2989e-06
1.998e-08
d
yr
n .2659384210908175 1.4339e-09 deg/d
Q 2.872717396789358 1.0326e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1622  
   data-arc span      9643 days (26.40 yr)  
   first obs. used      1994-02-16  
   last obs. used      2020-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47079  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:58:28  

Additional Information
 Earth MOID = .924375 au 
 Jupiter MOID = 2.19537 au 
 T_jup = 3.486 
[ 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 14.48   n/a E2021B10  
diameter diameter 3.198 km 1.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.361   0.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21180 (1994 DC)          Discovered 1994-Feb-16 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 DC = 1999 TF208 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-10 12:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin