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 ]  
11638 (1997 AH)
Classification: Main-belt Asteroid          SPK-ID: 2011638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1812313871586687 6.2181e-08  
a 2.45922220735395 1.1421e-08 au
q 2.013533955383791 1.4861e-07 au
i 6.274203550273278 3.9872e-06 deg
node 92.72470790273644 4.364e-05 deg
peri 312.8933837912111 4.5031e-05 deg
M 122.233502511205 9.5051e-06 deg
tp 2458722.219317436218
(2019-Aug-26.71931744)
3.6801e-05 TDB
period 1408.624003940147
3.86
9.8129e-06
2.687e-08
d
yr
n .2555685541301458 1.7804e-09 deg/d
Q 2.90491045932411 1.3491e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1497  
   data-arc span      11660 days (31.92 yr)  
   first obs. used      1988-12-28  
   last obs. used      2020-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51849  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:01:42  

Additional Information
 Earth MOID = 1.02864 au 
 Jupiter MOID = 2.48793 au 
 T_jup = 3.460 
[ 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 14.28   n/a E2021B10  
diameter diameter 7.449 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11638 (1997 AH)          Discovered 1997-Jan-02 by Kobayashi, T. at Oizumi
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 AH = 1988 YG = 1992 YM5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-10 18:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin