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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
10030 Philkeenan (1981 QG)
Classification: Main-belt Asteroid          SPK-ID: 2010030
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1796766725081523 3.1425e-08  
a 3.068782175996445 1.5569e-08 au
q 2.517393605961077 9.465e-08 au
i 1.169827736299904 3.725e-06 deg
node 349.5931591170111 0.00018682 deg
peri 343.4680070850009 0.00018713 deg
M 97.97191447764297 1.0986e-05 deg
tp 2458466.124405311619
(2018-Dec-13.62440531)
5.9907e-05 TDB
period 1963.575123682173
5.38
1.4943e-05
4.091e-08
d
yr
n .1833390511308342 1.3952e-09 deg/d
Q 3.620170746031813 1.8367e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1692  
   data-arc span      14029 days (38.41 yr)  
   first obs. used      1981-08-30  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52258  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:33:22  

Additional Information
 Earth MOID = 1.50718 au 
 Jupiter MOID = 1.75126 au 
 T_jup = 3.206 
[ 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 13.5   n/a MPO332914  
diameter diameter 10.966 km 0.342 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

10030 Philkeenan           Discovered 1981 Aug. 30 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Philip Keenan (1908-2000) was a professor of astronomy with the Ohio State University at Perkins Observatory from 1946 until his death. He was an expert in the field of stellar spectra and one of the creators (with W. W. Morgan) of the MK system of stellar classification. The name was suggested by R. Martino.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1981 QG = 1981 SJ3 = 1992 UN10 = 1995 EG9 = 1996 JV16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-03 00:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin