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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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05816069640241348 7.3399e-08  
a 5.227589611296241 1.2781e-07 AU
q 4.92354935899723 4.0735e-07 AU
i 22.20452377078047 8.2034e-06 deg
node 86.58706926565942 1.6627e-05 deg
peri 8.631586955493194 7.3421e-05 deg
M 73.39911123844152 6.5452e-05 deg
tp 2456110.399680994211
(2012-Jul-01.89968099)
0.00080436 JED
period 4365.66750517084
11.95
0.00016011
4.384e-07
d
yr
n .08246161659668405 3.0242e-09 deg/d
Q 5.531629863595253 1.3524e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      986  
   data-arc span      12733 days (34.86 yr)  
   first obs. used      1980-05-17  
   last obs. used      2015-03-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53187  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:18:21  

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-May); 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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