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 ]  
21476 Petrie (1998 HW101)
Classification: Main-belt Asteroid          SPK-ID: 2021476
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05435523180621997 1.8841e-08  
a 2.214610657370455 6.2789e-09 au
q 2.094234981728559 4.0955e-08 au
i 6.486225463505884 2.7336e-07 deg
node 31.44547942237987 4.1744e-06 deg
peri 180.9269550144682 2.418e-05 deg
M 323.6801298656831 2.2626e-05 deg
tp 2459321.946860213397
(2021-Apr-17.44686021)
7.5816e-05 TDB
period 1203.772742444728
3.30
5.1194e-06
1.402e-08
d
yr
n .2990597704255043 1.2719e-09 deg/d
Q 2.334986333012352 6.6202e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2185  
   data-arc span      16209 days (44.38 yr)  
   first obs. used      1976-10-26  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4949  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:46:03  

Additional Information
 Earth MOID = 1.0868 au 
 Jupiter MOID = 2.62349 au 
 T_jup = 3.644 
[ 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 13.97   n/a E2020-QM5  
diameter diameter 3.851 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.360   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21476 Petrie           Discovered 1998 Apr. 28 by J. Broughton at Reedy Creek.
William Flinders Petrie (1853-1942), grandson of British explorer Matthew Flinders, was a self-taught surveyor and archaeologist. His methods of meticulous excavation, recording and sequential dating became standard practice in the field. He has been called the father of modern archaeology.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050407/MPCPages.arcLast Updated: 2005-04-15

Alternate Designations
 1998 HW101 = 1976 UJ3 = 1986 XS2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-16 11:27 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin