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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05865872690114837 9.6098e-08  
a 5.230236327244339 1.4519e-07 AU
q 4.923437322896048 5.5294e-07 AU
i 22.2053369252302 1.0579e-05 deg
node 86.59898396189674 1.9597e-05 deg
peri 8.925989392275509 8.5156e-05 deg
M 56.56779677590465 7.6254e-05 deg
tp 2456113.989539047448
(2012-Jul-05.48953905)
0.0009331 JED
period 4368.983415104314
11.96
0.00018193
4.981e-07
d
yr
n .08239903103212047 3.4311e-09 deg/d
Q 5.53703533159263 1.5371e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      902  
   data-arc span      12367 days (33.86 yr)  
   first obs. used      1980-05-17  
   last obs. used      2014-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56009  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:46:19  

Additional Information
 Earth MOID = 3.94076 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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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