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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
21209 (1994 PO30)
Classification: Main-belt Asteroid          SPK-ID: 2021209
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1215694602893469 4.0342e-08  
a 2.851095186928157 1.3625e-08 au
q 2.504489083819746 1.1729e-07 au
i 4.60567429846316 4.1829e-06 deg
node 204.43529327 4.7806e-05 deg
peri 152.4955268625459 5.0021e-05 deg
M 192.4461277552444 1.6462e-05 deg
tp 2460214.904428145616
(2023-Sep-27.40442815)
8.2932e-05 TDB
period 1758.393227117099
4.81
1.2605e-05
3.451e-08
d
yr
n .2047323627322105 1.4676e-09 deg/d
Q 3.197701290036568 1.5281e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      10689 days (29.26 yr)  
   first obs. used      1992-03-02  
   last obs. used      2021-06-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49627  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:31:29  

Additional Information
 Earth MOID = 1.5008 au 
 Jupiter MOID = 2.26156 au 
 T_jup = 3.290 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457110.5 (2015-Mar-29.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1208350280523058 4.0591e-08  
q 2.506367298257091 1.1795e-07 au
tp 2456686.869221640449
(2014-Jan-29.36922164)
7.4647e-05 TDB
node 204.60967855849 4.8063e-05 deg
peri 150.4770329000815 5.0231e-05 deg
i 4.590113518515201 4.1768e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      10689 days (29.26 yr)  
   first obs. used      1992-03-02  
   last obs. used      2021-06-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49627  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:31:29  

Additional Information
 Jupiter MOID = 2.26156 au 
 T_jup = 3.290 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.647634687921989E-15 -4.7636196312895E-15 -1.944309484667542E-13 5.46947992088029E-15 -7.632350112506677E-14 -4.907145163830246E-16
q -4.7636196312895E-15 1.391291463331279E-14 7.428293196867223E-13 -1.370522413726674E-14 2.592114272695751E-13 1.577384335764099E-15
tp -1.944309484667542E-13 7.428293196867223E-13 5.572198144787374E-9 1.824148006086759E-11 1.105195996102051E-9 -5.682017581167994E-13
node 5.46947992088029E-15 -1.370522413726674E-14 1.824148006086759E-11 2.310043863752503E-9 -2.299048255869201E-9 -4.72977704698182E-11
peri -7.632350112506677E-14 2.592114272695751E-13 1.105195996102051E-9 -2.299048255869201E-9 2.523138826950232E-9 4.70364055475979E-11
i -4.907145163830246E-16 1.577384335764099E-15 -5.682017581167994E-13 -4.72977704698182E-11 4.70364055475979E-11 1.744558123772021E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.20   n/a MPO636382  
diameter diameter 6.519 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.114   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21209 (1994 PO30)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PO30 = 1998 KF45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-21 18:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin