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 ]  
7620 Willaert (4077 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2007620
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1471300076192514 4.7652e-08  
a 2.403448087096034 7.2643e-09 au
q 2.04982875172912 1.1437e-07 au
i 1.362335616008109 4.9035e-06 deg
node 317.6368079565502 0.00015052 deg
peri 214.2454106338054 0.00015099 deg
M 197.6499366131093 1.2839e-05 deg
tp 2459614.262722754834
(2022-Feb-03.76272275)
4.9502e-05 TDB
period 1360.976248375038
3.73
6.1702e-06
1.689e-08
d
yr
n .2645160049117892 1.1992e-09 deg/d
Q 2.757067422462949 8.3331e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1451  
   data-arc span      25070 days (68.64 yr)  
   first obs. used      1951-03-06  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54074  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:34:14  

Additional Information
 Earth MOID = 1.05554 au 
 Jupiter MOID = 2.21213 au 
 T_jup = 3.509 
[ 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 14.7   n/a PDS3 (MPC 29605)  
diameter diameter 2.105 km 0.413 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.525   0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7620 Willaert (4077 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 4077 P-L = 1951 ED = 1962 CB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-06 18:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin