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 ]  
101559 (1999 AJ9)
Classification: Main-belt Asteroid          SPK-ID: 2101559
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1840456310934766 4.324e-08  
a 3.118745749000555 2.0741e-08 au
q 2.544754219405651 1.3921e-07 au
i 2.185470990528198 5.7236e-06 deg
node 206.2190015702858 0.00010964 deg
peri 252.7016423602294 0.00011097 deg
M 325.4932153278314 1.7044e-05 deg
tp 2459193.328124145842
(2020-Dec-09.82812415)
9.6257e-05 TDB
period 2011.723936379746
5.51
2.0069e-05
5.495e-08
d
yr
n .1789509949599984 1.7852e-09 deg/d
Q 3.69273727859546 2.4559e-08 au
  Orbit Determination Parameters
   # obs. used (total)      718  
   data-arc span      7965 days (21.81 yr)  
   first obs. used      1999-01-09  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51134  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:59:51  

Additional Information
 Earth MOID = 1.56268 au 
 Jupiter MOID = 1.49305 au 
 T_jup = 3.189 
[ 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 14.9   n/a MPO412743  
diameter diameter 5.374 km 0.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101559 (1999 AJ9)          Discovered 1999-Jan-09 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 AJ9 = 2002 QN22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Dec-06 01:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin