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4489 (1988 AK)
Classification: Jupiter Trojan          SPK-ID: 2004489
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05816071677412093 7.8763e-08  
a 5.227589572617954 1.3764e-07 AU
q 4.923549216073574 4.5264e-07 AU
i 22.20452123532045 9.0357e-06 deg
node 86.587068154779 1.6692e-05 deg
peri 8.631601854315953 7.5886e-05 deg
M 73.39910033012107 6.7132e-05 deg
tp 2456110.399823156434
(2012-Jul-01.89982316)
0.00082743 JED
period 4365.66745671929
11.95
0.00017242
4.721e-07
d
yr
n .08246161751186899 3.2568e-09 deg/d
Q 5.531629929162334 1.4565e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      952  
   data-arc span      12648 days (34.63 yr)  
   first obs. used      1980-05-17  
   last obs. used      2015-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52604  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:10:01  

Additional Information
 Earth MOID = 3.94111 AU 
 T_jup = 2.848 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.00 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
diameter diameter 92.93 km 7.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14
rotation period rot_per 12.58 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[French, L.M.; Stephens, R.D.; Lederer, S.M.; Coley, D.R.; Rohl, D.A. (2011) Minor Planet Bul. 38, 116-120.]
geometric albedo albedo 0.0514   0.009 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 14

4489 (1988 AK)          Discovered 1988-Jan-15 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1988 AK = 1980 KA1 = 1989 AQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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