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 ]  
65639 (1981 DS2)
Classification: Main-belt Asteroid          SPK-ID: 2065639
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07785695885533019 5.2071e-08  
a 2.584624873941432 1.5205e-08 au
q 2.383393841474511 1.3679e-07 au
i 10.37155226499583 5.4777e-06 deg
node 290.5322464810816 2.8823e-05 deg
peri 27.9547737259211 4.4284e-05 deg
M 24.50368643736206 3.6799e-05 deg
tp 2458897.194455329360
(2020-Feb-17.69445533)
0.00015468 TDB
period 1517.730655609628
4.16
1.3393e-05
3.667e-08
d
yr
n .2371962368088285 2.0931e-09 deg/d
Q 2.785855906408353 1.6389e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1356  
   data-arc span      14056 days (38.48 yr)  
   first obs. used      1981-02-04  
   last obs. used      2019-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46593  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 10:42:38  

Additional Information
 Earth MOID = 1.37402 au 
 Jupiter MOID = 2.44163 au 
 T_jup = 3.396 
[ 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 14.1   n/a MPO259753  
diameter diameter 4.543 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.236   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

65639 (1981 DS2)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 DS2 = 1999 RY196 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-13 15:27 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin