Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
85532 (1997 WD21)
Classification: Main-belt Asteroid          SPK-ID: 2085532
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1501113680591672 6.2082e-08  
a 2.690759126498222 2.1564e-08 au
q 2.286845592901884 1.6219e-07 au
i 13.46476025414927 6.669e-06 deg
node 242.69918436 3.3547e-05 deg
peri 159.9839986373037 4.5216e-05 deg
M 106.8100174035773 2.9531e-05 deg
tp 2457122.178232843173
(2015-Apr-09.67823284)
0.00013072 JED
period 1612.169348552981
4.41
1.9381e-05
5.306e-08
d
yr
n .2233016030996506 2.6844e-09 deg/d
Q 3.09467266009456 2.4802e-08 au
  Orbit Determination Parameters
   # obs. used (total)      673  
   data-arc span      6688 days (18.31 yr)  
   first obs. used      1997-11-05  
   last obs. used      2016-02-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51376  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 18:57:28  

Additional Information
 Earth MOID = 1.29957 au 
 Jupiter MOID = 2.30156 au 
 T_jup = 3.317 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO320051  
rotation period rot_per 4.7682 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

85532 (1997 WD21)          Discovered 1997-Nov-23 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-04 07:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin