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 ]  
2813 Zappala (1981 WZ)
Classification: Main-belt Asteroid          SPK-ID: 2002813
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1505892845451537 6.7186e-08  
a 3.13751876308242 3.137e-08 AU
q 2.665042057302843 2.1608e-07 AU
i 14.73845525610528 9.0164e-06 deg
node 231.8534123891461 2.8704e-05 deg
peri 247.9852058850651 4.1209e-05 deg
M 247.6856066158808 3.1337e-05 deg
tp 2457433.801970646343
(2016-Feb-15.30197065)
0.00018015 JED
period 2029.915334653094
5.56
3.0443e-05
8.335e-08
d
yr
n .1773472981135555 2.6597e-09 deg/d
Q 3.609995468861998 3.6094e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      878  
   data-arc span      23618 days (64.66 yr)  
   first obs. used      1949-03-29  
   last obs. used      2013-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57028  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Dec-19 21:26:53  

Additional Information
 Earth MOID = 1.72255 AU 
 T_jup = 3.143 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.8 mag n/a MPO267718  
diameter diameter 32.57 km 1.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
geometric albedo albedo 0.0663   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
SMASSII spectral type spec_B T   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2813 Zappala (1981 WZ)          Discovered 1981-Nov-24 by Bowell, E. at Flagstaff (AM) (688)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 WZ = 1931 VZ = 1949 FC = 1964 TH = 1979 OS14 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-25 06:37 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin