Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
11889 (1991 AH2)
Classification: Main-belt Asteroid          SPK-ID: 2011889
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1775356010478708 7.1862e-08  
a 2.765031806868699 2.9305e-08 AU
q 2.274140223119784 1.9382e-07 AU
i 19.11034429434243 8.2913e-06 deg
node 120.8829291156947 2.2088e-05 deg
peri 214.7536857187436 3.1823e-05 deg
M 112.5898030384348 2.5422e-05 deg
tp 2456275.275250390982
(2012-Dec-13.77525039)
0.00011626 JED
period 1679.378636044863
4.60
2.6698e-05
7.31e-08
d
yr
n .2143649992165215 3.4079e-09 deg/d
Q 3.255923390617613 3.4508e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      825  
   data-arc span      8476 days (23.21 yr)  
   first obs. used      1991-01-07  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49195  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:01:16  

Additional Information
 Earth MOID = 1.28279 AU 
 T_jup = 3.238 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1 mag n/a MPO240301  

11889 (1991 AH2)          Discovered 1991-Jan-07 by McNaught, R. H. at Siding Spring (413)
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 AH2 = 1998 KZ55 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-23 11:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin